For sure Prigozhin does not want to lose all his men in Bakhmut. He wants to keep his private army intact with 5000-10000 men. So that very soon, when Putin is weak or there is a Kremlin power struggle. That Prigo can try to seize power with the backing of an army. His own Wagner private army.
If Wagner fights the FSB in Moscow and Kremlin, I hope they kill all the top FSB men. FSB scum should be wiped off the face of the earth.
The reports about Chechen blocking troops being brought in to prevent Wagner from retreating from Bakhmut appear to be true.