Some of my wireless interfaces dissapeared from bridge. I had to add it manually again. It’s so strange. I’m thinking about switching back to 2.8.8
Also I have the same problem . I am using wds nstream,
and have in bridge ether1 and wds1 interface ( using static wds bridge ). When I reboot the
router i found another interface uknown and invalid.
Then I remove it and reboot router. Then I can see it again.
It start happened in 2.9.10, but with 2.9.7 works fine.