Welcome! Similar story. I upvoted on a long standing account and got warned. Not sure which upvote did it. I’ve got a few hundred thousand karma across accounts. Had a fair share of OC hitall. Pretty typical engaged user.

Then I tried to help someone in a niche sub with buying bedding. And auto admin mod kept removing my comment post. Then the sub mods messaged me and said they tried to make my comment visible multiple times and couldn’t override the admin.

Then I followed mod advice and reposted my helpful comment only to get an auto banned on all accounts from the admin for “spam” (for two comments? Really?). The sub admin were able to override the ban and reinstate me since I did nothing wrong.

It’s way too frustrating to deal with. Out of the past year like 800 normal/helpful comments of mine have been shadow removed or admin removed.

At that point I’m just talking to myself. After 12 years, I never thought I’d leave Reddit but here we are. Happy to be on Lemmy.