hi there MRguitarist21, im afraid i cant offer a resolution but i have a very similar issue.
I have a Spider Valve MK2 2x12 Bognor
The preset/push in button that controls the parameters and different delays/reverbs etc has been damaged by my son (grrr) and the pot has become loose from the PCB.
I also have the same issue as you when dialing the reverb control up, this activates the delay/tremlo other modulation dials also and the screen flickers so quickly between lots of different presets.
Its unusable in the state that its in.
I would also love to hear peoples thoughts on this.
Many thanks
J