Does anyone else have this problem and is there a solution?

OpenVPN is set up to connect automatically, and wifi is set up too. The issue is that when the VPN is connected the mobile data connection is retained even when wifi is in range.

The expected behaviour would be that switching to wifi from mobile data would be done automatically and the VPN would reconnect via the wifi, but it is surmised that this could be a security risk. There is no constant flow of data through the VPN (in this user case), so maybe it is possible to get the device to pause any data being sent or received, switch to wifi, and then reconnect to the VPN, and resume data transmission/reception?

It seems to be ok with disconnecting from the wifi (when it is out of range) and switching to mobile data and reconnecting to the VPN, but the return to wifi must be done manually it seems.

Can the priority be edited or something?