Apps are randomly opening up after unlocking my Redmi Note 4 through fingerprint sensor?

I am experiencing this for about 2-3 weeks. When I unlock my phone a random app(which are on home screen, I think) opens up automatically. The apps which I mainly noticed are WhatsApp and themes. Is this a result of malware or anything else? How to fix? I did a bit of research on it sites like [quora](https://www.quora.com/Every-time-I-unlock-my-Android-phone-it-opens-Google-Chrome-all-by-itself-and-thus-more-tabs-open-every-time-Is-this-a-virus) , [android central](https://www.google.co.in/amp/s/forums.androidcentral.com/samsung-galaxy-note-5/574323-apps-randomly-popping-open-when-i-unlock.html%3famp) , etc. But none of them seems to work for me.