Bartok as Pre ampli

I use Bartok as Pre Ampli to Krell FPB. Anything with Roon and Mosaic is fine. The problem is only with Tidal Connect : I can’t control the volume of the source. It jums always to to max volume ( 0.0 db ) when i turn the knob without any rules.
I ask helping hand from the community !
Tks you all !