What to do when headphones buttons are not working after update to MIUI 7.5.2?

I am using Redmi 2 Prime, recently I updated the UI to 7.5.2. Once updated the headphone buttons are not working. I checked with another redmi 2 prime with older UI version and it seems to work fine. I tried lot of solutions none of it seems to work.

even i faced same issue. After update of this issue is fixed. This update is available through OTA, check for it.

even am facing the same issue for redmi prime 2 model.. got no support from Mi customer care..

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