ProtonVPN OpenBSD and DNS leaks

[stanl]

I am running OpenBSD -current and last night I managed to install ProtonVPN.
I went into my router configuration (I use Verizon FiOS) and changed the setting to obtain IPv4 DNS addresses automatically.
Went to dnsleaktest.com to check for DNS leaks and everything looked OK - the only server shown was one provided by the VPN.

This morning I booted up and again checked dnsleaktest.com and all I see is line after line of Verizon servers.

I am at a loss to explain everything looked good last night but not today.
If anyone has any ideas of where I should be looking I would be grateful.

Thank you