Default Why is my whatsapp icon shrinked in lockscreen only?

Halp! Whatsapp icon shrinks for no reason on lockscreen. And its with this icon only, no matter where i place it, on drawer, it shrinks. it was fine all along, it just shrinked today, i swear. And its not even cold outside. And i haven't been drinking. Haven't mingled with the phone for quite long too.

Batman is on vacation too, or i would have asked him. First World problems, damn!

Sent from my HTC One_M8 using XDA Free mobile app
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HTC One