I have found the little fix I made for my self two years ago, but I have no possibilities to test it at the moment, so no warranty about it
I made it for 1.15.X, so please keep this in mind. Didn't know if it still works with 1.16. It's better to make a backup of your installation before you try it !!!
The archive can simply be unpacked to the main directory, as far as I remember.
Here is the DropBox link.
https://www.dropbox.com/s/2n2x1w6qc...20Rotor%20FARP%20Collision%20Fix.7z?dl=0