New rig issues- 2x MTRX Studios and an HDX TB3

[adebarwick]

Hi- my first post. I have a new rig- iMac i9core Catalina, and I'm trying to implement 2x MTRX Studio boxes both connected from their port 1's into both HDX card points. The monitor out Jacks in box 1 are connected via my console PB to my main monitors .
All good- I have tested with an input source and can see signal into all 32 channels (box 1 and box 2). But- I can't monitor box2 , only box 1 from the output. I've tried a lot of solutions within DADman but just can't get a monitoring solution from box 2. I have enabled both boxes within DADman monitoring

if I daisy chain box 1 to 2 via digilink then I can monitor all 32 channels , but I halved my channel count by inly using one port on the HDX

Any thoughts to solve the issue without daisy chaining ?

Cheers in advance

Ade