Knob/Parameter flickering between 2 values

[Rio]

Ok, best you leave the video online. Maybe someone has an idea too. What I recognize from the video is that it is specific to "Shape1" and falls back on "Shape1" again, while you turn other knobs, because it can't catch any exact value (toggles whether 5 or 6) for Shape1. looks similar to my weird problem, where values flickers between 0-1,1-2, 2-3, 4-5 .. But it happened only in these small value range (<10) and in my case the knobs had not reached the value 0 by turn the knobs complete to left (only with fast movement).

Does this happen with all other parameters on the same way or does it jumps always to Shape1, by turning all other knobs?
Do you get smaller values on Shape1 than 5-6?
Do you get smaller values for all other knobs?
Did you do the "Knob test" several times or did you tried to open the case and a wiggle a little the black connector cable (with care)... while you run the "knob test" again? it just a guess.. I found out, that once the device was open, the phenonem first disappeared, I had done everything several times until it ran so far ...

best regards & good luck, rio