Can you confirm issue 1-3 occur with a Template Show as well (i.e. are not due to a corrupt Show file)?
You can try a software reset by power-cycling the mixer without pressing the Power Down button – you’ll find the Reset option in the Advanced menu at power up. Then start from a Template Show file.
> 5-8 minute boot up
Check that DHCP is disabled in the Network settings.
If none of these cures the problems, please contact your local dealer / distributor for support or visit the support site here to submit a support ticket.