Partially MixBusses are not recorded

Hi,

Do you have a same result if you change the routing to pre-fader as well?
If you route AES50-A 1-8 to Card out 17-24 does the card record the signal properly? If yes this means the routing has an issue and not the card itself.
As the card uses the same topology as the X-UF card it may worth to ask on the Behringer forum what’s going on.