Originally Posted by
mrcamp
Never had this issue on multiple android devices. You probably did this already but just in case - Under "Sound and Notification" in settings, there is an uption for "When device is locked", verify that this is set to "on". Also under whatsapp settings itself there are settings for notification. You can verify those as well.
Yep checked that and they're all set but thanks for the suggestions. It's now not happening everywhere & everytime but often does when I really don't want it to.