Wee update, after a bit of fiddling I discovered that the rotation handle image wasn’t loading in Chrome - if I clicked in just the right place I could rotate the object.

Refreshing the page didn’t appear to fix it, so I cleared the site cache completely and once I’d logged back in and accessed the board the handle had reappeared.

Not a bug, just a local glitch

I'm seeing this problem also.

Seems to be a common glitch…

I refreshed and it was fixed.