I found it odd that the day the NTSB(FAA?) followed the rest of the wotld in grounding the MAX is the same day the NTSB posted the black box details on Amazon's

I found it odd that the day the NTSB(FAA?) followed the rest of the wotld in grounding the MAX is the same day the NTSB posted the black box details on Amazon's plane. The nose going back down after pilots reversed initial nosedive sounds somewhat spurious.