docker-compose stop / start my_image - docker

Question

Is it normal to lose all data, installed applications and created folders inside a container when executing docker-compose stop my_image and docker-compose start my_image?
I'm creating container with docker-compose up --scale my_image=4
update no. 1
my containers have sshd server running in them. When I connect to a container execute touch test.txt I see that the file was created.
However, after executing docker-compose stop my_image and docker-compose start my_image a container is empty and ls -l shows absence of file test.txt
update no. 2
my Dockerfile
FROM oraclelinux:8.5
RUN (yum update -y; \
yum install -y openssh-server openssh-clients initscripts wget passwd tar crontabs unzip; \
yum clean all)
RUN (ssh-keygen -A; \
sed -i 's/UsePAM yes/#UsePAM yes/g' /etc/ssh/sshd_config; \
sed -i 's/#UsePAM no/UsePAM no/g' /etc/ssh/sshd_config; \
sed -i 's/#PermitRootLogin yes/PermitRootLogin yes/' /etc/ssh/sshd_config; \
sed -i 's/#PasswordAuthentication yes/PasswordAuthentication yes/' /etc/ssh/sshd_config)
RUN (mkdir -p /root/.ssh/; \
echo "StrictHostKeyChecking=no" > /root/.ssh/config; \
echo "UserKnownHostsFile=/dev/null" >> /root/.ssh/config)
RUN echo "root:oraclelinux" | chpasswd
COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]
EXPOSE 22
my docker-compose
version: '3.9'
services:
my_image:
build:
context: .
dockerfile: Dockerfile
ports:
- 30000-30007:22
when I connect to a container
Execute touch test.txt
Execute docker-compose stop my_image
Execute docker-compose start my_image
Execute ls -l
I see no file test.txt (in fact I see that the folder is empty)
update no. 3
entrypoint.sh
#!/bin/sh
# Start the ssh server
/usr/sbin/sshd -D
# Execute the CMD
exec "$#"
Other details
When containers are all up and running, I choose a container running
on a specific port, say port 30001, then using putty I connect to that specific container,
execute touch test.txt
execute ls -l
I do see that the file was created
I execute docker-compose stop my_image
I execute docker-compose start my_image
I connect via putty to port 30001
I execute ls -l
I see no file (folder is empty)
I try other containers to see if file exists inside one of them, but
I see no file present.

Answer 1

So, after a brutal brute force debugging I realized that I lose data
only when I fail to disconnect from ssh before stopping / restarting
container. When I do disconnect data does not disappear after stopping / restarting