GPG-signed commits were verified, now they appear as unverified

Summary

I have signed commits that correctly appeared as "Verified". Now (maybe after the 10.0 update?) they appear as "Unverified". The GPG key in my user settings shows my primary email (as verified), and another of my emails (as unverified).

Could this be that the email used in the commits has uppercase letters, while both my primary email and the one in the key are lowercase? Or is it just a temporary glitch?

What is the current bug behavior?

The commits show as unverified.

What is the expected correct behavior?

The commits should show as verified.

Output of checks

This bug happens on GitLab.com