You know, I’m not a saw guru, but, if that strainer were an aircraft part, that burr or tiny area that’s been mashed on the strainer might prevent it from going all the way in and sealing.
I’d dress it at least, or if I had another NOT mashed up, I’d replace it. There are some tiny nicks in the two “sealing lips” on it that can be seen as well.
If it were an airplane, replacing that part would fix it.When I see little stuff like that I fix it because I’ve been bitten many times in the past for overlooking or ignoring it.