Matomo Web UI doesn't recognize new Version

[ErikFeise]

Hi y'all

Just a quick infomartion in advance, we use matomo with docker-compose.
Since the Version 4.16 Matomo no longer displays new versions via the button for upgrading.
I read that this may be a Problem with the FW.

I've checked this with our IT-Sec team and the VM, on which our matomo instances are running, are allowed to go out on the Internet.

After that I tried:
wget builds.matomo.org
and
curl "https://api.matomo.org/1.0/getLatestVersion/"
which where not working inside the docker container.

I then created my own docker image (with matomo 5), that loads all my company certificates into the container and does
update-ca-certificates

After that all the commands from above will get the expected results (executed in the docker container).
Still the matomo web UI doesnt recognize that there is a new version available and shows that I'm still using Version 4.16.

OS: RHEL 8.9
PHP: 8.2.14

Best,
Erik