Reading through old posts about setting up 861 Controllers, a few people had mentioned the recommended card order.
I checked my configuration and it is not the same as recommended by Mconfig.

This is where the cards are installed, with recommended placement in (brackets).
IA10
IA00
ID25 (SL00)
Blank
Blank
OA13
IE42
OE12
SL00 (ID40)
ID40 (ID25)
Blank
CO00
Power

Could this be a source of the problem?


Anthem AVM70, 271, DSP7200x2, DSP7200.2HC, DSP5200x4, JL Audio F113,
Oppo UDP203, Panasonic UB9000, Kaleidescape Strato E, Apple TV 4K,
HDFury Vertex2, Epson LS10500, Stewart Filmscreen 110"