It's Plebstr. Yes I will upgrade to the new Openvibe soon. I think it's not related to nesting, it can't find the missing note on any relay? I have like 20 or so including all the ones Amethyst comes with.

Actually ... Maybe you're right? There isn't a note that's missing, it's just rendered incorrectly??

The only way it would know about a missing note is if another note references it

That's what I thought was happening but tbh I can't be bothered investigating further.