ok i typed a repro for this issue. but then looked at the Delay block closer.
for the modifier on the Input Gain, you have the Min to 100 and the Max to 100 as well. you also have Auto-Engage turned on. so it seems you just want this block to turn on when you move the pedal.
can you confirm that is the only goal of the Modifier and Pedal here for the delay block?
regardless, if i remove the modifier from the Delay Input Gain, there is no issue. with the preset as is, there seems to be a "CPU stall" or something when the pedal is moved, as the Delay is turning on. the Wah gets stuck in whatever position it's at for a bit, then eventually works as expected.
i'm wondering if having the Min and Max both set to 100 is causing issue, either mathematical or otherwise, as the pedal is attached telling it to change, but it's forced between 2 of the same value, meaning no change. i could be wrong there, but it's a strange setting. it could also be the Auto-Engage for the delay block. i'll have to try a bunch of things to find out.
if your only goal is to have the Delay block turn on when you use the Wah, there may be another way. lemme think about it and get back. but please confirm that goal if i'm right.