While doing the Spend Time with girls for code hints event, I decided it'd be funny to gag Yuki first, assuming she just wouldn't have the gag in for the following event, which would be an understandable time for an "automatically remove gag" event if any.
... instead, the renders show her without gag, but all her lines are replaced with stuff like "Hng gnhhn cnhch mm fnrph" and the MC responds to this as if it were completely understandable.
I assume that since it would be a pain to manually rewrite every scene to have two versions, and that these "noises" seem kind of comprehensible (I'm assuming the screenshot would normally say "you'll have to catch me first" but haven't seen this event yet), that you're using some sort of automatic text replacer to remove vowels and add hngs and it just ... probably should not have applied to this scene? I don't know, I'm reloading my save so I can not gag her and hope that this scene makes more sense.
I have to admit though, it makes for fantastic comedy going back and forth between gagtalk and normal english, since both participants are seemingly just pretending that any of it makes sense. It's like if Monty Python got into BDSM.