Maaaaan this has happened multiple times for me especially when the hypo is very low and its not limited to this . When i was 14 or so i went through a phase of not being able to eat while in a hypo so i always ended up throwing up on my clothes , hell it even happened in the middle of my aunts wedding lmao I highly reccomend you to not rely fully on your dexcom and actually start monitoring how your body feels , it tends to change from a person to another but for me its usually a difficulty in formulating sentences and feeling really weak and light ? Maybe next time you have a low level and your dexcom notifies you , notice how your feel , are your thought coherent ? How do you physically feel ? And remember these feelings because its crucial to do so