Topic: BabyFace Pro ADAT with FF400...Totalmix routing?

I've connected my FF400 to my Babyface Pro, with the BFP being the master and ff400 the slave.

In Total mix I sporadically get the ADAT inputs 3/4, 5/6, 7/8.... but most of the time I only get ADAT in 3/4.

After that, when I patch into input 3 , the instrument comes through ALL inputs.

I can't find anything in the manual nor online.

Any help would be great!