At first, I was questioning if the transmission line pressure was low. However, that wouldn't prevent it from rolling in neutral. Are you sure there isn't an axle issue in the front preventing it from moving?
I attached a pic below showing the drive axle/CV joints. Check their condition. Make sure nothing is allowing one of them to move in the splines at the transmission or the hub. Also, when it stops moving, does the engine rev as if you are in neutral?
Let me know. Also, if you could record what it is doing and upload it, it may help me.
See pic below.
Sunday, May 9th, 2021 AT 9:22 PM