I encountered this problem a little while ago when doing some setup for the lighting of a map, where whenever I would interact with a token or any image on the board in the token settings, that whenever I save the changes I made to the tokens settings(And even if I don't make any changes and just save settings), the token itself dissapears and the settings don't save when i reload the page, but when I interact with the settings of a token not on the board via a sheet on the sidemenu this doesn't happen.