Basically if you hold a key down (eg W for walking) the instance count (shift+f1) just starts going up and up and doesn’t decrease. I tested this on an empty baseplate so nothing else should’ve affected the results to my knowledge.
Something else that is weird is that the instance count stops going up when you press (not hold) a second key (eg F9 or A for walking).
(This applies to both FE and non-FE.)
Edit:
Unsure if this relates but perhaps this has to do with UserInputService.WindowFocusReleased not firing being fixed @darthskrill
Edit 2:
OS: Windows 10 64Bit
Edit 3:
game.DescendantAdded:connect( function ( obj ) print( tostring( obj ) ) end )
Doesn’t print anything being added.