It happens when I rotate and apply the objects as seen in the picture. I also reduced the number of segments.

shape-bender-test_ecati.skp

Maybe it could be this way.

test.skp

The hinge and part must be a group.

Do you want to do this?
Click on the picture for animation.

Two joins, SketchUp, MsPhysics_ecati.skp

It works perfectly. I didn't see any problem.
Click on the picture for animation.

If you upload the skp file, we can have a look.

I changed some values as in the picture.

Klappe90GradfastMotor_ecati.skp

I just set "Word Scale" to 45.

testneu_10_ecati.skp

Is that what you want?
Click on picture for animation.

Klappe4hinges_ecati.skp

We make this adjustment so that the second wheel stops. If you set "Angular Friction = 0", you will see that the wheel continues to spin.

"MSPhysics_v1.0.3" does not work properly yet. Author Anton_S is working on the new version. The new version has been released yet.
For more information see here. https://sketchucation.com/forums/viewtopic.php?f=323&t=56852&start=840