if it started popping new leaves and stem elongation after it already stopped doing so, you have a re-veging plant for sure. check your timers. check for light leaks - it'd have to be major to cause a re-vege.
this doesn't happen randomly. the plant is not reveiving long enough uninterrupted darkness.
pic 6 definitely looks like re-vege leaves... no seration. single to triple lobed etc.
if those leaves popped before the 'vege' growth ended (it goes for 4 + weeks beyond flip date), then it's a revege.. if just some spiralling on buds, it's foxtailing.