If you have the Wah set to T-Wah, the expression pedal can disable/enable the block. This sounds like a bug in that Touch Wah does not use the expression pedal ... yet the expression pedal inactivity/activity turns the block off/on. Just because the normal wah and the t-wah share the same block, they should not all be controlled by the expression pedal park state. If the Park setting we're not global setting, the preset could work around this. Suspect this is also an issue if the expression pedal is set to Inactivity and also for the lfo autowah. This means you cannot truly have a preset that enables the T-Wah. The T-Wah's activity will be controlled by the expression pedal's park state.