ToME: the Tales of Maj'Eyal

With Shield Wall active, when taking off the shield, or switching weapons to a no-shield configuration, Shield Wall is still active and its bonuses still apply.

Also, when using a Generic Talent point to increase mastery in Weapons and Shield, the Shield Wall increased bonus is not applied, until it's deactivated and reactivated again.

Both of these are old bugs.

As to the first maybe the weapon switch and wear commands could check for sustains that require a certain type of weapon and then check that their preuse is true. If not then it could deactivate the sustain.