I appreciate your suggestion of the Lubuntu forums. They’re relatively new, so that’s good advice. That said, I’m the head of QA at Lubuntu, so I don’t think it would help for me to try to answer my own question. I’m just not an expert with Snaps.
forceupdate is an interesting thought. It does make a difference with
sudo, so perhaps there’s some sort of race condition. Still, not being clear enough on Snaps (if it were a normal package, I’d just blame a
postinst), I’m not sure if this is with the inner workings of
snapd or with the actual snap package itself.
That and it doesn’t resolve the issue that
electronplayer doesn’t run right unless
snapd is upgraded, which is not the case in Ubuntu.
Anyways @Khaotic had the right answer to this: the Snapcraft forum is the place to go. I’ll take it up there.