Pipeline Execute - Prepare on Neighbor Failed

Anyone have an idea what the culpret might be with this “prepare on neighbor” error with the Pipeline Execute snap, excuting a child pipeline on my groundplex?

I get these sometimes, seemingly randomly… Most annoying part is that even though I have an error view on the Pipeline Execute snap, this error will still kill the whole pipeline, instead of just sending that particular document/error down the error path.

Open a case with support.