Invisible pieces

I am occasionally experiencing that the black or white knights or bishops are invisible. It just happened in this game:
(opponents white bishops) and again lichess.org/Eq1xlRz10hl0 (my white bishops). I do have screenshots. I am using fully updated Safari on a fully updated Mac. Is this bug wellknown? Can I do anything myself? (I mean without becoming a Lichess code contributor)

Yeah, this crops up from time to time. I had experienced invisible bishops as well (Safari). It seems pretty random!?

Just search in the forum, think „invisible“ will do.