VLAN over OVPN link not restoring after lost link

I have two Mikrotik routers with firmware 6.42.6
I have a working level 2 (mode Ethernet) openvpn link between them. server has a fixed ip and the client a dynamic one behind a nated firewall
I have a working vlan across ether4 interface on both routers.
After power off and on, on the client side, the connection between the two routers is lost. The vpn link is automatically restored, but the vlan tagging on the server is lost. In the bridge the interface is changed from “” to “unknown”. See screenshots.

Wat do i miss here?

bridge unknown.png
bridge vlan unknown.png
bridge vlan.png
bridge.png