The same thing just happened to my ULF port on the right side
. Did you have a temporary fix?
EDIT: I managed to pull my damaged gasket out, it doesn't seem like it is glued. There is a lip that holds the gasket to the body
EDIT 2: Here's a temporary fix i did. Hopefully this will be useful to someone. I removed the gasket from the housing and re-seated it. Then i used the tip of the tweezers to press against the part of the gasket that's broken so that it preserves its shape when inserting the filter. This ensures the filter doesn't sit on the broken gasket, which is what causes it to come loose. I'm using the red filter so i used some tape to secure the filter (just in case)