Player 10.13.16
If you pause while playing a level, then change the release rate, the "R" replay symbol appears, even though I am only changing the release rate and not even doing anything else. Once unpaused, the "R" disappears.
This was already mentioned by möbius and Proxima in chat, and got fixed yesterday. :)
Was fixed for RR changes, but not for nuking. Is now fixed for both.