My game is doing he same with the floating people and slow to load/disappearing buildings
I messaged the game people and told them about it and the shop refusing to open though it's completed building
Rather than delete the game which will put you back to square 1 and not necessarily remove the problem(if it's a game coding issue) contact game support and let them know
The more people who make them aware of the issues, the more they know what to focus on
Thank you, sent them this info.