s8 volume key issue

[shakirs8]

i have been experiencing issue of volume keys in s8. it does not decrease or increase to next volume no. e.g from 10 to 11 does not go but goes directly to 15 from 10 or from 10 to 5

[aramis]

must be a volume rocker or key issue. pls have it check with service center

[whatsappsss]

my WhatsApp and messages volume is not working

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