As the title suggests. I was having multiple issues with posts, upvotes, downvotes and comments not saving.
Deleting the app and reinstalling has refreshed the whole thing and it now works better than ever.
Posting here in case anyone else had similar issues.
I also just deleted and reinstalled app, but apparently there is a much simpler way:
“Please go to “Manage Accounts” and then tap your Lemmy.world account. Hit “Edit Account”, enter your password, then hit save.”
https://lemmy.world/post/1314032