Hey there,
Hmm, this could be related to some kind of browser error for those specific players if it loads for some, but not others. Perhaps something related to GPU max texture size.
I’d recommend asking the players who are encountering it to make sure that they have Hardware Acceleration turned on, and to open their dev tools consoles (F12) and refresh the page to see if there is a specific error being logged there that can help us understand what is going on. If there is, please provide a screenshot of the error, and we may be able to help figure out what is going on in this unusual case