Ghosting doesn't kill ideas, ghosting kills vibes. 

Regardless of a partner bailing or not, no one can take your ideas away from you. I've learned to cope by just accepting that it'll happen; I've done it, other people have done it, it's inevitable in this hobby where no one really has to write on a schedule or be expected to produce content regularly. 

Make no mistake, it'll hurt when it happens sometimes. I've had a partner I interacted with frequently here do it to me a long, long time ago. Left without a word. Now? They're around. I'm glad they're alive and seem to be well even if they don't talk to me anymore. It is what it is. It hurt in the moment, but hey, their choice of ending stories is theirs and I just have to keep it pushing. Managed to find some serious talent in lieu of their vanishing, so it's not all bad! 

Could just be they can't match your skill level, or you can't match theirs, and they'd rather peace out than address the difficulty they're facing. Honestly, there are a lot of unknowns. Someone could bail because of IRL drama, or because the chemistry between you is off. There's no universal reason why it happens, man. Just keep it pushing. Find people you vibe with, and don't be afraid to bond with new people who vibe with you in return. Have fun.