I don’t use Safari that much but I just tried it out to log in here and like you it works fine, no ads and stays logged in.
Ever ridden one ? Back in the late 1970’s, I put up with the one I bought for about 7 weeks before getting rid of it. Utter pile of shit compared to my Dominator 650ss. Currently got a 1979 750 in my laundry room whilst a mate moves home. Andy
Test to see if I can post images: . . . . Nope, not working for me either. Using Chrome but that's all I have access to whilst at work and it's always been OK in the past.
I mentioned this issue yesterday but at the time assumed it was because my phone is phucked, but then tried later using my MacBook with the same negative result. I was using Safari on both devices.