Ansible execution order issue - https://github.com/ansible/ansible/issues/75334

inventory.yml

---
all:
  children:
    LBs:
      children:
        LBs_PRD_east:
          hosts:
            LBs_PRD_east_A:
              pos: 10
            LBs_PRD_east_B:
              pos: 11
        LBs_PRD_west:
          hosts:
            LBs_PRD_west_A:
              pos: 12
            LBs_PRD_west_B:
              pos: 13
        LBs_STG_east:
          hosts:
            LBs_STG_east_A:
              pos: 14
            LBs_STG_east_B:
              pos: 15
        LBs_STG_west:
          hosts:
            LBs_STG_west_A:
              pos: 16
            LBs_STG_west_B:
              pos: 17
    Linux:
      children:
        Linux_CnC:
          hosts:
            Linux_CnC_A:
              pos: 18
            Linux_CnC_B:
              pos: 19
        Linux_DBs:
          children:
            Linux_DBs_PRD:
              children:
                Linux_MariaDBs_PRD:
                  children:
                    Linux_MariaDBs_PRD_east:
                      hosts:
                        Linux_MariaDBs_PRD_east_A:
                          pos: 20
                        Linux_MariaDBs_PRD_east_B:
                          pos: 21
                    Linux_MariaDBs_PRD_west:
                      hosts:
                        Linux_MariaDBs_PRD_west_A:
                          pos: 22
                        Linux_MariaDBs_PRD_west_B:
                          pos: 23
                Linux_RedisDBs_PRD:
                  children:
                    Linux_RedisDBs_PRD_east:
                      hosts:
                        Linux_RedisDBs_PRD_east_A:
                          pos: 24
                        Linux_RedisDBs_PRD_east_B:
                          pos: 25
        Linux_WebSrvs:
          children:
            Linux_WebSrvs_PRD:
              children:
                Linux_ApacheWebSrvs_PRD:
                  children:
                    Linux_ApacheWebSrvs_PRD_east:
                      hosts:
                        Linux_ApacheWebSrvs_PRD_east_A:
                          pos: 26
                        Linux_ApacheWebSrvs_PRD_east_B:
                          pos: 27
                    Linux_ApacheWebSrvs_PRD_west:
                      hosts:
                        Linux_ApacheWebSrvs_PRD_west_A:
                          pos: 28
                        Linux_ApacheWebSrvs_PRD_west_B:
                          pos: 29
                Linux_nginxWebSrvs_PRD:
                  children:
                    Linux_nginxWebSrvs_PRD_east:
                      hosts:
                        Linux_nginxWebSrvs_PRD_east_A:
                          pos: 30
                        Linux_nginxWebSrvs_PRD_east_B:
                          pos: 31
                        Linux_nginxWebSrvs_PRD_east_C:
                          pos: 32
                        Linux_nginxWebSrvs_PRD_east_D:
                          pos: 33
                        Linux_nginxWebSrvs_PRD_east_E:
                          pos: 34
                    Linux_nginxWebSrvs_PRD_west:
                      hosts:
                        Linux_nginxWebSrvs_PRD_west_A:
                          pos: 35
                        Linux_nginxWebSrvs_PRD_west_B:
                          pos: 36
                        Linux_nginxWebSrvs_PRD_west_C:
                          pos: 37
                        Linux_nginxWebSrvs_PRD_west_D:
                          pos: 38
                        Linux_nginxWebSrvs_PRD_west_E:
                          pos: 39
                Linux_SquidSrvs_PRD:
                  children:
                    Linux_SquidSrvs_PRD_east:
                      hosts:
                        Linux_SquidSrvs_PRD_east_A:
                          pos: 40
                    Linux_SquidSrvs_PRD_west:
                      hosts:
            Linux_WebSrvs_STG:
              children:
                Linux_ApacheWebSrvs_STG:
                  children:
                    Linux_ApacheWebSrvs_STG_east:
                      hosts:
                        Linux_ApacheWebSrvs_STG_east_A:
                          pos: 41
                        Linux_ApacheWebSrvs_STG_east_B:
                          pos: 42
                    Linux_ApacheWebSrvs_STG_west:
                      hosts:
                        Linux_ApacheWebSrvs_STG_west_A:
                          pos: 43
                        Linux_ApacheWebSrvs_STG_west_B:
                          pos: 44
                Linux_nginxWebSrvs_STG:
                  children:
                    Linux_nginxWebSrvs_STG_east:
                      hosts:
                        Linux_nginxWebSrvs_STG_east_A:
                          pos: 45
                        Linux_nginxWebSrvs_STG_east_B:
                          pos: 46
                        Linux_nginxWebSrvs_STG_east_C:
                          pos: 47
                        Linux_nginxWebSrvs_STG_east_D:
                          pos: 48
                        Linux_nginxWebSrvs_STG_east_E:
                          pos: 49
                    Linux_nginxWebSrvs_STG_west:
                      hosts:
                        Linux_nginxWebSrvs_STG_west_A:
                          pos: 50
                        Linux_nginxWebSrvs_STG_west_B:
                          pos: 51
                        Linux_nginxWebSrvs_STG_west_C:
                          pos: 52
                        Linux_nginxWebSrvs_STG_west_D:
                          pos: 53
                        Linux_nginxWebSrvs_STG_west_E:
                          pos: 54
                Linux_SquidSrvs_STG:
                  children:
                    Linux_SquidSrvs_STG_east:
                      hosts:
                    Linux_SquidSrvs_STG_west:
                      hosts:
            Linux_WebSrvs_DEV:
              children:
                Linux_ApacheWebSrvs_DEV:
                  children:
                    Linux_ApacheWebSrvs_DEV_east:
                      hosts:
                        Linux_ApacheWebSrvs_DEV_east_A:
                          pos: 55
                        Linux_ApacheWebSrvs_DEV_east_B:
                          pos: 56
                    Linux_ApacheWebSrvs_DEV_west:
                      hosts:
                        Linux_ApacheWebSrvs_DEV_west_A:
                          pos: 57
                        Linux_ApacheWebSrvs_DEV_west_B:
                          pos: 58
                Linux_nginxWebSrvs_DEV:
                  children:
                    Linux_nginxWebSrvs_DEV_east:
                      hosts:
                        Linux_nginxWebSrvs_DEV_east_A:
                          pos: 59
                        Linux_nginxWebSrvs_DEV_east_B:
                          pos: 60
                        Linux_nginxWebSrvs_DEV_east_C:
                          pos: 61
                        Linux_nginxWebSrvs_DEV_east_D:
                          pos: 62
                        Linux_nginxWebSrvs_DEV_east_E:
                          pos: 63
                    Linux_nginxWebSrvs_DEV_west:
                      hosts:
                        Linux_nginxWebSrvs_DEV_west_A:
                          pos: 64
                        Linux_nginxWebSrvs_DEV_west_B:
                          pos: 65
                        Linux_nginxWebSrvs_DEV_west_C:
                          pos: 66
                        Linux_nginxWebSrvs_DEV_west_D:
                          pos: 67
                        Linux_nginxWebSrvs_DEV_west_E:
                          pos: 68
                Linux_SquidSrvs_DEV:
                  children:
                    Linux_SquidSrvs_DEV_east:
                      hosts:
                        Linux_SquidSrvs_DEV_east_A:
                          pos: 69
                    Linux_SquidSrvs_DEV_west:
                      hosts:
                        Linux_SquidSrvs_DEV_west_A:
                          pos: 70

playbook_A.yml

---
- hosts: all
  gather_facts: no
  serial: 1
  order: inventory
  tasks:
    - name: Debug
      debug:
        msg: "{{ pos }}: {{ inventory_hostname }}"

playbook_B.yml

---
- hosts:
    - Linux_nginxWebSrvs_STG_west
    - Linux_ApacheWebSrvs_STG_west
  gather_facts: no
  serial: 1
  order: inventory
  tasks:
    - name: Debug
      debug:
        msg: "{{ pos }}: {{ inventory_hostname }}"