Listing traffic history no longer works!

I frequently check my items’ Traffic History by clicking on the number of views whilst in Seller Hub. This no longer works (or very, very occasionally). The screen comes up but no ‘graph’, the cursor just spins and spins and spins…..

I think I’ve done all the obvious things…. Logging out and back in again, clearing  History & Website Data etc, all to no avail. Is this yet another example of eBay tweaking something to ‘improve’ things but actually making things worse? 

PS - this is on the WEBSITE , not the App. (That stopped working properly a couple of ‘updates’ ago).