I also encountered this problem when using version 13.1.1, and I had to cancel the 'prevent cross site tracking' option. But this kind of operation obviously brings some potential problems. Chrome and Firefox do a good job in this aspect. Can we also deal with the samesite problem?

Any update about this? I see a lot of developer and user effected by this problem. Does Apple have any plan about this? Or Apple don't care this bug? Even it will cause lot app not work???

This Problem have already reported in 2019: https://developer.apple.com/forums/thread/129064?login=true&page=1#624055022 But no support care ...