As Sam has said, WiFi is very sensitive to the environment. While the Vero 4K has an internal antenna, it should be better than that found on a nano dongle, though that might make it more efficient at picking up RF interference from a nearby microwave oven.
I can’t offer any straightforward answer but here are a few things that come to mind:
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There is a setting on your router that is causing group rekeying to be performed every 600 seconds. Try to find it - it will probably be called something like “Group Key Update Period” - and set it to the maximum allowed value. It’s a bit of a log shot that it will eliminate the disconnections but it’s something that needs to be changed anyway…
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Ensure that the router is on a fixed channel. On 2.4GHz only use channels 1, 6 or 11.
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Install CRDA with
sudo apt-get install crda. Then set it to the relevant country withsudo iw reg set <country-code>. A list of country codes can be found in/usr/share/zoneinfo/zone.tab. Also edit file /etc/default/crda and add the relevant country code afterREGDOMAIN=. -
Make sure transmission is not running (as well as openvpn).
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Another long shot but ensure that WiFi is using WPA2/PSK.