Happened on PS4. Not sure exactly what caused it.
One of my team mates managed to push him of the edge and that works.
Sentinel in general is broken in all kinds of ways.
This particular bug happens when you destroy the crystals “too soon” - while it’s jumping.
Yep. Hopefully that can be fixed with some adjustments to the game script in a future update. Meanwhile, you just have to make sure you let the beast land and start recharging before you shatter the crystals.