in my case i have vlan configuration using
/interface bridge> set numbers=0 vlan-filtering=yes.
And i have noticed that i was able to see root port. (one site has priority 6000)
Once i switced to vlans by using switch chip all interfaces in the bridge become designated port.
Even if i play with priority it doesn’t give me root port
im wondering is that how it works if im using swich chip.