Docker file ownership issue

build.sh

# Image where non-root user is created and set as default
docker build -t abc -f Dockerfile-1 .

# Image where more files are copied and user is changed to root and back to non-root
docker build -t abc-2 -f Dockerfile-2 .

Dockerfile-1

FROM busybox
ARG PUID=1000
ARG PGID=1000

RUN addgroup -g ${PGID} abc && \
    adduser -D -u ${PUID} -G abc abc

USER abc

Dockerfile-2

FROM abc

COPY file /home/abc
RUN ls -al /home/abc


USER root
RUN chown -R abc:abc /home/abc && \
    ls -al /home/abc

USER abc

RUN ls -al /home/abc

output.log

Sending build context to Docker daemon  862.2kB
Step 1/5 : FROM busybox
 ---> af2f74c517aa
Step 2/5 : ARG PUID=1000
 ---> Using cache
 ---> 5f2412626bd1
Step 3/5 : ARG PGID=1000
 ---> Using cache
 ---> aa65960c0407
Step 4/5 : RUN addgroup -g ${PGID} abc &&     adduser -D -u ${PUID} -G abc abc
 ---> Using cache
 ---> e9130b459629
Step 5/5 : USER abc
 ---> Using cache
 ---> 93358e6f9609
Successfully built 93358e6f9609
Successfully tagged abc:latest

Sending build context to Docker daemon  862.2kB
Step 1/7 : FROM abc
 ---> 93358e6f9609
Step 2/7 : COPY file /home/abc
 ---> 577dcaea3383
Step 3/7 : RUN ls -al /home/abc
 ---> Running in 811df0055fd6
total 8
drwxr-sr-x    1 abc      abc           4096 Apr 30 11:27 .
drwxr-xr-x    1 nobody   nogroup       4096 Apr 30 10:46 ..
-rw-rw-r--    1 root     root             0 Apr 30 10:51 file
Removing intermediate container 811df0055fd6
 ---> 3528d33abd8d
Step 4/7 : USER root
 ---> Running in 3c3ae77cb445
Removing intermediate container 3c3ae77cb445
 ---> b156e940e3e6
Step 5/7 : RUN chown -R abc:abc /home/abc &&     ls -al /home/abc
 ---> Running in a4c13880d019
total 16
drwxr-sr-x    1 abc      abc           4096 Apr 30 11:27 .
drwxr-xr-x    1 nobody   nogroup       4096 Apr 30 10:46 ..
-rw-rw-r--    1 abc      abc              0 Apr 30 10:51 file
Removing intermediate container a4c13880d019
 ---> 41bd4567efbd
Step 6/7 : USER abc
 ---> Running in 48bf1fe9c72d
Removing intermediate container 48bf1fe9c72d
 ---> cf618921a61c
Step 7/7 : RUN ls -al /home/abc
 ---> Running in 4f171b287f07
total 8
drwxr-sr-x    1 abc      abc           4096 Apr 30 11:27 .
drwxr-xr-x    1 nobody   nogroup       4096 Apr 30 10:46 ..
-rw-rw-r--    1 abc      abc              0 Apr 30 10:51 file
Removing intermediate container 4f171b287f07
 ---> 3b8d3769da55
Successfully built 3b8d3769da55
Successfully tagged abc-2:latest