Force VPN slows connection

I setup my new AR150 with Windscribe VPN successfully. Fast.com speed tests consistently run ~22 Mbps. When I enable Force VPN, the speed drops dramatically to ~5 Mbps. I’m testing on both my laptop and fire tv. I can toggle the switch on and off and experience the same results. I’m using firmware 2.27. Any ideas what is going on?

AR150 cannot achieve 22Mbps openvpn. 5Mbps openvpn is normal.

Maybe you are not on vpn network when you got 22Mbps.

I used it and tested the speed here