Same, also when subscribing to other communities. I got an error saying the action wasn't performed (basically), when upvoting, commenting, or subscribing. But when I would re-load the feed, the actions did in fact go through. No big deal on my end, I'm used to seeing those types of small errors.

But they haven't been happening today, so maybe it's been resolved (-ish)... idk, looks resolved from my end

Edit for clarity: I'm using Liftoff on Android atm. Also saw issues on wefwef, but I'm waiting to see if the hack has been more secured before using a web-based app again. Mainly because I don't know enough about the technicalities, so I'm leaning toward a little caution for now

Probably related to this, jerboa and the UI were hiding it. I'm having a look at it now. It will probably be a corrupted entry in the activity table so it cannot perform a check.