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.
You somehow dodged a bullet, or recently reauthenticated. A great many people had their apps stuck in a wonky state because many instances logged everyone out after last night’s hack.