What you assume about a bridge is probably wrong.
Read the documentation on what a bridge is and does.
You only need one bridge and add all interfaces to it.
Then configure the interfaces, VLANs, firewall rules and routing.
Since you want to use CAPsMAN, i advise you to use VLANs to ease configuration and provisioning.
It can save a lot of time if you want to expand your network with eg. new SSIDs for different functions.
thank you
actually I use the bridge for the IP address (IP–>address only for the bridges, not for each eth port), so I do not give specific IP addresses to each eth port, but only one for the bridge, and than put the ports in it. If switch like use, all ports under one bridge, in the router eth1 has it’s own WAN address, than the two bridges which use the eth1 as gateway.
It is beyond me why you want multiple bridges.
Just one is enough for what you want to do.
Do yourself a favour and read about how MikroTik devices with ROS do routing and switching.
Stick to best practices, you will thank yourself later for doing so.