Midi crashing Logic on Thread 6

Got a funny little crash going on when I close Logic Pro, though only when I close.

Logic is pretty stable here (v 11.0.1 under Sonoma 14.6.1) on an M2 Studio Ultra.

I'd love to understand what's going on here so I'm posting a crashlog. The issue is always thread 6, with what seem to be references to midi?

The problem seemed to start after I installed a Roland driver for their new GM800 guitar synth (amazing unit, incredible tracking btw). I'm not convinced this driver is really ARM compliant and after frequent crashing I uninstalled this driver - using the uninstaller - and since then the crashing is happening much less often.

I now drive Logic from the guitar synth using a Nektar mdi-to-USB converter box, this way I can still use the GM800 without the driver installed. But could this be the culprit I wonder?

If someone out there understands crashlogs would you be kind enough to cast an eye over this case?

( In my setup I've no other midi devices connected apart from the GM800, though an M Audio Hammer 88 and a Maschine Micro are connected via USB.)

Like that man in the YT video from Richmond Great Park with an angry stag round the other side of his tree-trunk ... I would truly appreciate some help here!!