Well Maybe it's just my system then on the Simple Delay.

Well from the simple Delay I moved onto the Multi-Tap Delay
to create some presets. I tried to make a simple Panning
Delay on a Snare hit, where it would hit and then pan from
left to right and then echo out accordingly. As soon as I
started moving the feedback slider, I was getting results
that really didn't correspond to what I was adjusting.
Here's the parameters for this effect for a panning echo
for 1/4 notes at 120 BPM. Number of Taps 2. Tap 1=
600ms,Gain=91% Pan=-100%. Tap 2=1200ms,Gain=60% Pan=100%.
Mod rate=.1Hz Mod depth=0% Feedback=40%. Dry Out=-Inf. Wet
Out=-3dB. Low pass=4K. So I start with these settings and I
loop a selection of a snare hit and then I open up the
assignable effect to make adjustments,I hit "Cntrl-space
bar" I adjust the feedback slider and all of a sudden I'm
getting double hits and my panning isn't correct.
Basically you can't do a realtime parameter adjustment. I
then close the effect and stop playback, then when I hit
play again, the effect works correctly how I would have
expected it to when I was making the adjustments. Someone
else try this one out and see if you get this problem.