Here is a workaround: use the Stabilize filter and some minor file rename hacking. Stabilize a shaky video that is at least as long as your target video; it creates a stabilization file A.stab. Add the Stabilize filter to the target video you want to shake; it creates stabilization file B.stab. Save and close the project. Finally, remove file B.stab and copy A.stab to B.stab.
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