Whatsapp is NOT an app from HP. I believe Whatsapp app has had few hiccups recently. Whatsapp on my phone suddenly stopped for at least 3 months and then comes back without contacts. I'm happy to use Viber now after switching from Microsoft phone to Samsung phone.
BH *** **Click the KUDOS thumb up on the left to say 'Thanks'** Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.