VPN with Firewall enabled - iptables rules

Having an issue when enabling the firewall on a WAGO PFC200 in the WBM (Security>Firewall>Interface Configuration>Fire Enable for Interface (Bridge 1).

This will enable the firewall, however it also does not create the necessary iptables rules to allow docker based VPN to function. As soon as the firewall is enabled, the VPN will be unable to connect to any host services (only the VPN container is accessible).

Does anyone have a solution for this, or example of the iptables rules needed? Tried TOSIBox Lock and ZeroTier, they both have the same issue when the firewall is enabled.

I noticed that there was a preloaded rule in the MAC address filter tab “Enable docker bridges”.
This rule is not enabled by default.
Maybe something to try ?