It does seem from time to time,  that some devices and browsers, just don't seem to marry up well with eBay!

It seems it's the turn for Safari,  but the app and mac have always had issues, now and then popping up.

Yes,  others are facing the same,  the issue seemed to have been solved last week,  but with so many reports coming in daily,  it's obvious it's not be solved for one and all!

Have you tried this combo a laptop / PC with Chrome, that seems to work well with eBay. 

@pgovern