Terraform get only symlinks first missing instance of local module

gistfile1.txt

% TF_LOG=trace tf get                                                                                                                                      
2019/08/17 01:01:33 [INFO] Terraform version: 0.12.6
2019/08/17 01:01:33 [INFO] Go runtime version: go1.12.7
2019/08/17 01:01:33 [INFO] CLI args: []string{"/usr/bin/terraform", "get"}
2019/08/17 01:01:33 [DEBUG] Attempting to open CLI config file: /home/acobaugh/.terraformrc
2019/08/17 01:01:33 [DEBUG] File doesn't exist, but doesn't need to. Ignoring.
2019/08/17 01:01:33 [INFO] CLI command args: []string{"get"}
2019/08/17 01:01:33 [TRACE] ModuleInstaller: installing child modules for . into .terraform/modules
2019/08/17 01:01:33 [DEBUG] Module installer: begin acm
2019/08/17 01:01:33 [TRACE] ModuleInstaller: Module installer: acm 2.2.0 already installed in .terraform/modules/acm/terraform-aws-modules-terraform-aws-acm-1318df0
2019/08/17 01:01:33 [DEBUG] Module installer: begin cdn
2019/08/17 01:01:33 [TRACE] ModuleInstaller: cdn address "/home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" will be handled by go-getter
2019/08/17 01:01:33 [DEBUG] will download "/home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" to .terraform/modules/cdn
2019/08/17 01:01:33 [TRACE] go-getter detectors rewrote "/home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" to "file:///home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn"
2019/08/17 01:01:33 [TRACE] fetching "file:///home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" to ".terraform/modules/cdn"
Downloading /home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn for cdn...
2019/08/17 01:01:33 [TRACE] ModuleInstaller: cdn "/home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" was downloaded to .terraform/modules/cdn
2019/08/17 01:01:33 [DEBUG] Module installer: cdn installed at .terraform/modules/cdn
2019/08/17 01:01:33 [DEBUG] Module installer: begin cdn-user
- cdn in .terraform/modules/cdn
2019/08/17 01:01:33 [TRACE] ModuleInstaller: Module installer: cdn-user <nil> already installed in .terraform/modules/cdn-user
2019/08/17 01:01:33 [DEBUG] Module installer: begin developer
2019/08/17 01:01:33 [TRACE] ModuleInstaller: developer address "/home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" will be handled by go-getter
2019/08/17 01:01:33 [DEBUG] will download "/home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" to .terraform/modules/developer
2019/08/17 01:01:33 [TRACE] go-getter detectors rewrote "/home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" to "file:///home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn"
2019/08/17 01:01:33 [TRACE] copying previous install .terraform/modules/cdn to .terraform/modules/developer
Downloading /home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn for developer...
2019/08/17 01:01:33 [TRACE] ModuleInstaller: developer "/home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" was downloaded to .terraform/modules/developer
2019/08/17 01:01:33 [DEBUG] Module installer: developer installed at .terraform/modules/developer
2019/08/17 01:01:33 [TRACE] modsdir: writing modules manifest to .terraform/modules/modules.json
- developer in .terraform/modules/developer

% ls -l .terraform/modules
total 16
drwx------ 3 acobaugh acobaugh 4096 Aug 17 00:54 acm
lrwxrwxrwx 1 acobaugh acobaugh   56 Aug 17 01:01 cdn -> /home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn
drwx------ 3 acobaugh acobaugh 4096 Aug 17 00:54 cdn-user
drwx------ 2 acobaugh acobaugh 4096 Aug 17 01:01 developer
-rw------- 1 acobaugh acobaugh  578 Aug 17 01:01 modules.json


% rm -rf .terraform/modules/developer                        


% TF_LOG=trace tf get | tee trace2.log                                                                                                                                          
2019/08/17 01:05:08 [INFO] Terraform version: 0.12.6
2019/08/17 01:05:08 [INFO] Go runtime version: go1.12.7
2019/08/17 01:05:08 [INFO] CLI args: []string{"/usr/bin/terraform", "get"}
2019/08/17 01:05:08 [DEBUG] Attempting to open CLI config file: /home/acobaugh/.terraformrc
2019/08/17 01:05:08 [DEBUG] File doesn't exist, but doesn't need to. Ignoring.
2019/08/17 01:05:08 [INFO] CLI command args: []string{"get"}
2019/08/17 01:05:08 [TRACE] ModuleInstaller: installing child modules for . into .terraform/modules
2019/08/17 01:05:08 [DEBUG] Module installer: begin acm
2019/08/17 01:05:08 [TRACE] ModuleInstaller: Module installer: acm 2.2.0 already installed in .terraform/modules/acm/terraform-aws-modules-terraform-aws-acm-1318df0
2019/08/17 01:05:08 [DEBUG] Module installer: begin cdn
2019/08/17 01:05:08 [TRACE] ModuleInstaller: Module installer: cdn <nil> already installed in .terraform/modules/cdn
2019/08/17 01:05:08 [DEBUG] Module installer: begin cdn-user
2019/08/17 01:05:08 [TRACE] ModuleInstaller: Module installer: cdn-user <nil> already installed in .terraform/modules/cdn-user
2019/08/17 01:05:08 [DEBUG] Module installer: begin developer
2019/08/17 01:05:08 [TRACE] ModuleInstaller: developer address "/home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" will be handled by go-getter
2019/08/17 01:05:08 [DEBUG] will download "/home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" to .terraform/modules/developer
2019/08/17 01:05:08 [TRACE] go-getter detectors rewrote "/home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" to "file:///home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn"
2019/08/17 01:05:08 [TRACE] fetching "file:///home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" to ".terraform/modules/developer"
2019/08/17 01:05:08 [TRACE] ModuleInstaller: developer "/home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn" was downloaded to .terraform/modules/developer
Downloading /home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn for developer...
2019/08/17 01:05:08 [DEBUG] Module installer: developer installed at .terraform/modules/developer
2019/08/17 01:05:08 [TRACE] modsdir: writing modules manifest to .terraform/modules/modules.json
- developer in .terraform/modules/developer



% ls -l .terraform/modules                                   
total 12
drwx------ 3 acobaugh acobaugh 4096 Aug 17 00:54 acm
lrwxrwxrwx 1 acobaugh acobaugh   56 Aug 17 01:01 cdn -> /home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn
drwx------ 3 acobaugh acobaugh 4096 Aug 17 00:54 cdn-user
lrwxrwxrwx 1 acobaugh acobaugh   56 Aug 17 01:05 developer -> /home/acobaugh/work/eit/terraform-modules/tf-aws-swe-cdn
-rw------- 1 acobaugh acobaugh  578 Aug 17 01:05 modules.json