I don't have common.conf but I do have pubring.kbx. I meant I plan to remove that key from my keyring because it's like a decade old and expired, but I figured maybe it was somehow related to this bug since it's the last key shown, so I've left it in.

If you can get the developers to make a try-build that is built securely then I'd guess most of us would be happy to try it. Not all of us have a build system for gpg.

In T3378#106440, @werner wrote:

Can someone please add

disable-check-own-socket

to gpg-agent.conf to test whether this is the cause for the problem. ( note that I asked for this also in T3401)