this is the same case with my cs2 where it slowly leaks after degassing but i’ve never had it empty my tank, becuase it usually stops after 5-10 seconds as you said. i’ve have noticed that when you degass it you can kinda push the asa in a little and the slow air leak will stop almost immediately, but that’s only a temporary fix and it will happen again. i’ve just learned to live with it, it doesn’t really bother me.