Ship vibrating at super high frequency after undock

[glen.mack]

I have a moderately sized ship, carrying a small payload that works perfectly until the cargo is undocked.

The camera then begins to shake and the SAS still works for the most part.

If a kerbal touches the ship without grabing hold of it it, they are either killed, flung 1.5km away in an instant, or the camera takes on the shaking.

Is this a base game KSP probelm?

Installed are Camera Tools, Infernal Robotics, KAS (no KAS is being used during the undock) Hullcam, Hyperedit, KOs, Kerbal Engineer, Scansat and Ambient light adjeustment.