Question 2DOF Motion Rig Error

Hey guys, I am currently building a SRR for my thesis together with a classmate. We both started in September 2022 and are now in the end testing. Sadly, we got a problem and dont know how to fix it... The simulator is working completely fine in AC, but sometimes the motors move into a weird position when playing. Once they drove there, the simulator stops to move because it exceeded the motor limits. Here is a video where you can see the problem:
https://www.youtube.com/shorts/FklWfMn0Vno?si=OtFmNsV2cbkOTNdg
Sometimes this error happens after like two minutes, but also sessions for like 20 minutes are possible before this error happens. To get the motors moving again I simply have to start SMC3, where I can see that both motors have exceeded their limits... after starting smc3, the motors are moving to their center postion immediately. Then SimTools is also working again after closing SMC3.
Here are a couple hardware facts:
I am using 2 440W Motors from the Simukit website, with a 24V Power supply (also Simukit), To get the position of each Motor i am using a 10k Potentiometer. My motor controller is a 2x32 Sabertooth together with an Arduino Uno.
Software: newest SMC3 version, Arduino Code SPS_softstart_8.2, SimToolsV3 with Assetto Corsa Plugin.
Wiring is done as described in this tutorial: https://www.xsimulator.net/communit...ial-pid-motor-driver-sketch-w-softstart.9277/
I will post my SMC3 and SimTools settings on Monday.
It would be great if someone could help us.

Hello, here are my software settings:

In the picture "fehler" you can see that the pot line of the motors has exceeded the clipping max. This Screenshot was taken right after the error in the video happend.

Its called not connected because the Motor wasnt connected to the rig

I ve done the sine test with my standard pwm signal of 100, Rig connected and person in it. I tried it for motor one and two

I dont know whats wrong with my PWM settings, in my opinion the SMC3 sine test is looking good... Could you please take a look at it @noorbeast ?

I changed the PWM Signal to 200, but the error still occurs. Is it possible that its a hardware problem and not a software problem?

And mind USB hubs could be a problem too.
if you're using one hub, @JimmyLässig, try without the hub just to be sure it's not it

Thanks for the reply. On which cables do you use the ferrit rings? Only on the ones for the Poti for example or also for the power supply?
Do you use shielded cables in generel or only for specific connections?

Hey guys, before i change all the cables etc I d like to measure the serial signal which gets to the Sabertooth with an oscilloscope. I already tried measuring between the S1 port and ground, but them some errors occured: I had a short PWM signal visible on the oscilloscope, the motors moved a bit and then stopped in this position. ( i dont think that they have communicated with SMC3). So now my question: Is there even a way to measure the S1 port properly??

This pdf contains all of the schematics i use.

Hey guys, I also tried SimTools V2 but the same error occurs. I also changed the wires to shielded ones and added ferrit rings. Still the same error.
At this point I feel a bit hopeless, so I d be very thankful if someone could take a look at my schematics.

Changed Fpwm to 25kHz, but didnt help anything, still the same error.