I agree that it is quite possibly related to the version of Podman moreso than an inherent issue. I am currently satisfied, however, and have no desire to fiddle with it any more… Or at least until Debian 13 gets released.

My use of PinP is almost entirely for cleanliness. It allows me to more easily for me to wipe clean the build environment (clear out space, troubleshooting). It also mildly improves security as the ‘untrusted’ actions containers run on a separate environment from the important Forgejo container.