This issue only seems to be happening to people using the PC Xbox Client (Gamepass, Microsoft) as my friend on steam was able to remove the coffer and I could carry on as normal but this issue is very strange, seems to have started yesterday (2023/06/29) and am unsure what may be causing it to bug out.
I did notice that the Coffer doesn’t update value in real time, no idea if that has something to do with it and hope someone understands the issue better.