That’s very helpful, thank you @colcarroll!
I guess my main remaining concern/question is your point that it’s “hard to tell without checking”. I understand that you don’t know enough about the model to say anything more concrete but is there any “checking” that I can do on my side? I get that divergences are notoriously hard to debug (and as you explained based on somewhat arbitrary rules) but I am still hoping to develop some some best practices/intuitions in tackling them