Ok, so I tested the D10 some more today and I found a bug with it, or mine is dodgy.
I have the output of the D10 connected to my Headphone amp. If I turn the headphone amp OFF during play and then back on (sometimes I need to do this several times), my D10 crashes. What I mean with crash it that the display resets shortly back to 44.1kHz and then the ouput is muted. If I then switch to a DSD file transferred via DoP it still shows me PCM albeit with a higher kHz value.
The only thing I can think of is a ground issue but I tried with one of my other DACs and could not reproduce this issue at all.
So in Short, if I turn off my AMP my DAC resets. First I thought it was the relay in the D10 which just closes and then does not open again, but seeing that it then no longer "understands" DoP makes me really think it crashes internally.