My bet is it’s too hot or the light is too intense, I normally raise the prop off the mat by about a inches otherwise it get too hot. Also intense light will also do that as will letting the clones sit in water that’s gathered at the bottom of the prop.
With the lid on and the mat keeping them warm your humidity should be fine. Don’t open any vents on the prop for about 5 days and when you do check them every 20 mins or so to make sure they have not wilted, if they have close back up the vents. If all good after a few hours chances are it’s all good.
I only spray my clones the day I take them or if a few droop the following day.
Hope this helps pal