Why isn't my Kyocera Hydro Air detecting my headphones?

So, my Hydro Air won't pick up a headphone jack, and instead, it'll play sound through my main speakers. However, it only happens with some headphones, and not all of them. My headphones were working fine. Then later that evening, they started becoming finicky. Answers anyone?

Hi there. I'm using a different phone and experience the same. Looks like not all 3.5mm headphone jack fits the same. Had to bring my phone all the time to test if a headphone/headset works for my phone.

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