This and other LLM issues still seem to be in 2019.6. Even with all Avid hardware, can't get the damn thing to work.
There are obvious bugs with the 'Persist sends during LLM' functionality. I've been in contact with 'support' for over almost 2 years now, but they seem unable to figure it out.
Only today they promised me that they would escalate the issue and (finally) take a proper look. Fingers crossed!