Director + surface connected to Mixrack aux issues

My first time doin this few days ago…

My connection setup on Director that i selected was ( pull from mixrack and surface )
laptop was on the mixrack besides the stage and it was for simple monitor mixing.
just a quick simple mix/send.

Connection was good everything pops out same as on the surface.
during the soundcheck i mix the 7 piece band ( 7 PS 15 ) aux send.
I noticed after every few minutes the send level on all aux changes by itself alltogether with its pre/post selection.

does anyone experience this also?
could it be that my setup was wrong?
could it be my network port/driver/ip?

it is not totally clear what your problem was

if you are on director and surface at the same time,
there it is possible that the person on the surface
is affecting your mix on director