If I understand your situation correctly:

Switching from scene 2 -> scene 3 causes problems
Switching from scene 1 -> scene 3 is fine

This could mean that:

a) Scene 2 sets something differently that interferes with scene 3's expected setup
b) Scene 3 may have memory turned off for the parameter that needs to be adjusted back to match the Scene 1 setting

Right now, that's my theory. There could be different reasons for this - but to illustrate one made-up example (to help understand why I'm theorizing this):

Scene 1 sets superknob to 0
Scene 2 sets superknob to 64
Scene 3 has superknob scene memory turned off (in other words, it doesn't set superknob)

... and the Scene 3 Part will sound tinny if superknob is at 64 and sounds fine if it is set to 0.

Here, if you go 2->3 then there will be the issue because Scene 2 sets up Scene 3 for the problem. The fix in the above would be to turn on superknob memory for scene 3 and make sure superknob for scene 3 is set to 0.

To really know what's going on with your Performance would require some more digging (details) - but maybe this can get you pointed in the right direction.

Jason, Thank you for that info. I'm certain that is what it is. I'll dig into it tonight
Thank you again!