Loading Loop, Loading to 95% then back to 0%
This is the worst kind of bug to receive. It means you are stuck in The Void.
There isn't much you can do here at this stage. It is advised that you reach to Customer Services straight away to let them know you are stuck and require the developers to look into your account and fix it manually.
Your best option is to make a small screen recording of the issue that shows you having this problem, and either sending it directly in an email, or uploading it to YouTube or Google Drive (with public sharing) and email [email protected]
This is not a quick fix sadly, and will take several days for them to resolve your issue.
Typically, this happens during anytime you switch maps. Whether you are switching between season maps, playing in Lines we Cross, Survivors at War, Restricted Zone etc.
There is no exact reason as to why this happens but it appears to happen when it fails to move your town to the new location/map. When this happens your town doesn't exist on any map causing you to fail to load into the game. Other players will usually see you displaying in the clan as Townhall level 0, as your town isn't anywhere to be found.