Hi terman,
Had some similar problems with starting streams on Flex2i connected wirelessly.
See this post:
It was a matter of server speed, as I had changed to i7 core maschine the problem with starting streams was solved. But occasionally with wifi connected players i have sudden stops or skips with Qobuz content. It is a bit strange but looks like a problem with bluesound. All cable connected device stream without problem.
Maybe you can test it with another server maschine…
Best regards
André