Kerbal Space Program

In this case the grabber had been telescoped using the assembly widgit into the body of the craft, actually there were multiple parts overlapping in the same place. Including Steadler Advanced Inline Stabilizer, Z-200 small circular battery, OKTO-2 satellite pod all crammed into the nose of a Mk2 1.25m Adapter. I include the craft file "Fuelplane.craft".

The behaviour was apparent after launch to orbit, arming grab and grabbing another craft (with 5 Kerbal pods and a satellite pod on it but no kerbals), transferring fuel, separating again and disarming the grab, applying thrust to move away from the target craft, closing down the game, opening the game later, switching to the target craft and performing a maneuver and then switching to the Fuelplane in map view. I dont know how much of that is absolutely necessary, all I know is that it didn't have a problem prior to using the grab.

The problem manifests as a visible constant judder some of the time with the craft vibrating when the grab is disarmed, there is a noticeable stickyness about arming / disarming, also an inability to engaged timewarp much of the time when disarmed but not if you catch it mid judder, also an inability to return to the Space Center due to acceleration detection.

If the grab is armed all the acceleration / collision problems cease possibly due to the changed geometry of the part.