I kind of having a similar issue with you, the system sometimes crashes:
panic(cpu 5 caller 0xffffff8014fb205c): Invalid queue element linkage for 0xffffff95175c6b10: next 0xffffff9516bce900 next->prev 0xffffff95175c6b10 prev 0xffffff95155b40c0 prev->next 0xf7ffff95175c6b10 @queue.h:255
I was thinking it might be my CPU OC issue, but it happens even when I running on default CPU speed and voltage. I have read a note from somewhere that high-speed RAM is having issues with Bluetooth and in my experience that using the trackpad and BT headphones will easier replicate the crash. So I decided to run my RAM on 2400MHZ for a while to compare.
Now I see your comment here just wanna check what's your RAM speed under XMP? (I OC my 4*8GB DDR4 to 4GHZ before)