eBay are having current issues with outdated systems.

They are advising to ensure the device and browser you are using is up to date,  and the recent app update is installed.

There is also an issue with Safari, and apps forever glitchy,  do need constant updates.  If using the app, have you done this?  Also, some found uninstalling and reinstalling the app has helped.

Or,  if you can,  switch a laptop / PC with Chrome, that seems to be the best combo with eBay.

Many are experiencing various issues because of the above,  you are not alone .

@gjm6666