I have just realised that is an early access thread you have referenced. The reason I didn’t notice is because I want absolutely nothing to do with early access and it didn’t occur to me that is something I need to check before posting. Now I want to delete my post there. How do I do that?
Just to be clear, I am posting about a current production issue, not early access issue as are others. Is support aware of this or are they treating it as an early access issue? There seems to be multiple triggers. In my case the behaviour is being triggered by moving sections of my library and/or SPLs. In this case it is being triggered by group management: