Cause of top leaves folding after changing rooms?

Hi there - this is what’s left of my first grow ( lost two - Males). Any idea what is causing the top leaves on this Amnesia plant to fold - I suspected a light issue although it’s not hot at canopy level. It is a bit dryer in new room (RH 37 vs 41) and there is a 12 degree temp swing vs 4 degree) when it goes dark for 6 hours (73-61). I do realize they all got a little too much N2 a few weeks ago but all we’re doing ok until the move. Thanks
 

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