With an OE12 and an OA13 you need two TM00 termination cards. I wonder whether you have both those (they are small and hard to see, very close to the motherboard). Anyway, the key thing is, have you tried with ONLY the IA00 and the OA13 (or just the OE12 instead of the OA13) installed? Nothing else except the CO00, of course? You do need to try this to eliminate some of the variables.

Cinema/Music: Trinnov Altitude32 8-16,218,Cloud 4 channel, Marantz UD5007,DSP5200SE(2+C),DSP3300(4),DSW(2),271,MShort Ceilings,AppleTV 4K
TV: Marantz SR7013 Wharfedale Diamond 9x4+Celestion(C)
Music: Roon,i7NUC8gen,QNAP TS253A, Sony Scala, MS200, Garrard DDQ650,Wharfedale Diamond 12.3
Kitchen: AD88 (bluetooth via i80).