The „perseverance“ Perk does only protect from knock back while charging, not while releasing the attack.

This is especially problematic with the thunder hammer if you have Aftershock with a second smash.

You can easily dodge out while charging but not while the attack is performed.

The same problem exists with Bulwarks „armoured advance“ perk but works perfectly with the tactical when choosing „Hightened vigour“ perk or with Vanguard’s „upper hand“ perk. Tactical and vanguard are basically immune to any knock back after a parry or block which is exactly what the perk description says. 

Please fix those perks on Bulwark but especially on Assault.