Assuming your water parameters are within line, that's relatively normal. Nems definitely do weird things. Tank moves/chemistry/light changes are stress events and it moving to seclusion isn't unheard of. During the settle in period, don't attempt to feed it.
Over the next little while, or may try out a few different places in the tank until it finds somewhere the light and flow suit it.
Keep an eye on it Definitely. Watch the mouth for signs of gaping. TBH, I can't tell from the pics if it was bleached or if that's just its color.
If you see the mouth gaping open, constant inflation/deflation cycles, an inability to remain connected to the rock. If you see these, please report back as that could be a sign of an infection.