I was asked about this by a friend that probably saw it on FB. It was news to me honestly that the MD could take away the MSV. It makes sense if things get really confusing on the stage......as they can.
IMHO when the gun fails or ammo jams etc and there is a extended period of focus on the shooter, assisting them and making sure they handle the guns safely in resolving the issue it's not uncommon for me as the TO to lose track of the target sequence as well. Especially if it's not a easy sweep to being with.
If I don't know I stay silent.......or literally tell the sho