My Samsung Galaxy Tab A (2016 version) just had a software update. I can no longer copy/paste from the clipboard into a gmail email. I can still copy/paste into the subject line of the email for some reason. When I do the long click, the only option that pops up is "format".
I also have a Samsung phone, and I can still copy/paste as normal.
I also have a Samsung phone, and I can still copy/paste as normal.