Snooopy22

Version Stock Ksp2 Version 0.1.0.0.20892 OS/Specs Windows 11, Ryzen 7 3700X, RX 6600 XT, 16 GB RAM Bug Description After stage separation on a stratolaunch launch, KSP sets the target as the CoM between the original carrier plane and the strato-payload. When the payload leaves phys range/stages (I'm not sure of the cause), it destroys both vessels. Video https://clipchamp.com/watch/9jbxBckb0at I'm not sure of any workarounds at this moment.

You either have to close your game between each launch or, as you stated, create a new save.

I made a new save and I don't encounter this bug anymore. It may have to do with the number of crafts you have saved, but that's just speculation.