Hey, I’m using IOS 15.8.7 (not yet updated my phone to 15.8.8) 

Given what you’ve said, I’m gonna also guess that a lot of other people with the same issues are on the same IOS as me. Why eBay would make their site no longer compatible with safari on older IOS is beyond me, I don’t have the money to buy a more modern IPhone, was bad enough when EBay did this with the app, 

I did try my Google app and it did the same thing there too.

will take your suggestion and report it to eBay directly at some point soon. 

Not sure what on earth EBay are thinking, they’ve been making a lot of very poor and very questionable decisions lately. 
It’s rapidly getting to the point where using EBay is more stressful than satisfying