DSD on Linn DS plays too fast (higher pitch)

[Arnold]

Hi,
After upgrading my ADS to Katalyst, I switched to play DSF files instead of converting these files to Flac. I switched because for me the original DSF files sound better then the Flac converted file.
But I have a problem playing DSF.
If the first file played on the ADS after turning it on, is a DSF file, then the pitch is too high, hence the file is played too fast. This is also with all DSF files following. But ...
If the next file is a Flac file (or the first played file is a Flac file), then there is no issue with the DSF pitch/speed.
But after turning off the ADS, the above is valid again.
I contacted Linn helpline, but they can not replicate this issue with a DSF file I provided them. Linn did also use Minimserver to serve the file to their ADS. So, Linn can not help me.

I have no idea why Linn is not having this issue, but I do.
I have no idea what causes this speed anomaly.
Is it the player (ADS) or is it the musicserver?
Is it settings in Minimserver?
I use Minimserver only as a server, so no transcoding.

I would appreciate your help on this.