The phrase "to hang over" means to remain unresolved or undecided, often referring to a situation that is causing anxiety or uncertainty. It can also mean to continue into the next day or extend beyond its expected timeframe.
To be honest, you're likely to find these sorts of questions hanging over most exchanges, as the public doesn't quite trust the cryptocurrency world as a whole yet. (dailybitcoinnews.com)
If you are still hung over from last night's celebrations, I regret to announce that we have more drinking to do — because today is our trophy parade! (justarsenal.com)