Bug / Crash Errors when ending playmode

[TheMunk]

Are you able to reproduce this in a fresh project, with only Obi 5.1 installed?

I havn't had time to test it yet. But regarding the broken ropes, it seems to happen consistently when I duplicate a rope, duplicate the blueprint, and then apply the new blueprint to the rope. I lose control over the rope like so:
 

If I then revert the blueprint to the original one that the rope was cloned with, it updates to the changed blueprint but is still broken with the particle controls: