Mikrotik’s bridge pretty much acts the same as an unmanaged switch would - it just passes the tags along and doesn’t know or care what they mean, so it really won’t interfere with vlan tagging unless you went in and purposely blocked it by using bridge filter rules or else changed the vlan mode on a switch menu option (I don’t think the sxt has a hardware switch in it anyway, so this couldn’t possibly apply in that case)