I extracted campaign scenarios and all related tags successfully. Editing all maps worked like a charm.

But suddenly the Recorded animations for covenant dropships in a30 and a50 got... well... "corrupted".

The dropships start their animation 10 or so world units below the original start point, which makes them crash into ground and trees trying to run the animation that is supposed to ahve no obstacles in the way.

I have tried to fix this, but I have yet to find a way that doesn't mean starting my custom map all over again from zero.

Any help?

If it really is just height, you can move the vehicle up or down that many units.

If you have a copy of the scenarios with valid recorded animations, delete all them from yours, then File > Import Recordings, then pick the scenario with the valid copies of the recordings.