That red is the new spaces that are shown when you drag and drop a tile. This fx was introduced in the last few releases so the issue most likely has to do with that new code.
Just adding my screenshot to the chorus. This is Chrome on an older Android tablet, but our newer tablet, phones, and computer are unaffected. I'm not sure when this changed, but I just noticed it yesterday after force refreshed the page after a hub reboot. Just recently updated my C-7 to 2.3.9.154.
I am not sure, but it is possible that the Smartly code was broken accidentally by these recent drag-n-drop changes on firmware. If that is true, someone will have to fix the Smartly code.
I am not sure if people are talking about this being broken in Smartly dashboards or the stock ones at this point in the thread.
Yeah true, the fix in beta is to deal with the red background on "old browsers", no idea if that's the same issue as with Smartly or not. Maybe it will fix both