Theophilos ... that's unfortunate but it should be stable swapping between PCIE pools A & B to optimize the distribution of lanes, no?
Yes, it worked beautifully from the first day. I moved both Sonnets to Pool A, which overloaded Pool A at 200%, but when I tested the read/write speeds of the drives, they were not really impacted. I think the only issue is if I copy files from one Sonnet to the other, which I typically don't do.
Interestingly, when I installed 10.15.5 today and switched back to Automatic Bandwidth, I discovered the same panic while sleeping as I said. But when I changed it back to having both on Pool A and restarted, the Mac also panicked when going to its first sleep. I was starting to think that 10.15.5 even broke the fix, but after restarting and trying again, it seems the fix continues to work.