Graffiti7675 I mistakenly referred to you in my post, but I meant the other poster that asked about the open-source app ( @notahuman ) -- my bad!
de0u As for adding to github, I don't think that the aforementioned issue is the right one, since that's mainly talking about Google Play Services mirroring behavior with Google Services Framework and not about secondary profiles; so it would be better raised as a new issue. Also, I don't have a github account at the moment! :)
But even before posting to Github, it would be good to confirm or deny if this is actually a GrapheneOS issue -- it may actually be an upstream bug in the Android code, in which case there is no "issue" with GrapheneOS at all. The only way to confirm this is for someone with the stock OS to try this on a secondary profile. Anyone in the community?