Hi.
I have the same issue. I am not sure which OMV update broke it but data transfer via 5ghz wireless is sometimes slow and video playback from OMV stutters from time to time.
usually I get around 22-23 MB/s but it drops to 1-2 MB/s.
switching to 2.4 ghz works fine (but with approx. 12-13 MB/s much slower than 5 ghz if it works)
my first guess: fritzbox 7490 is broken. but while data transfer from OMV is hanging other data transfer (ftp, http, samba from other computer) is working without any issue therefore I think it is not related to 5ghz wifi.
although I can see it on multiple computers.
would be great if I can use 5 ghz again without rolling back to previous version (0.9x)
No clue why this could be related to OMV. any ideas?
thanks for your help!