Hi @aficio, thanks for reaching out! It must have taken some time to write such a comprehensive message - I appreciate your dedication to the community! What you’re describing sounds like a recurrence of the issue: Parent workflow is continuing while a subworkflow is waiting for webhook
That was also mentioned in Should a Parent Execute workflow wait if a call to a Sub workflow uses a Resume on WebHook or Wait node?
I’ll add a post to Known Issues so others can be on the lookout for this scenario.