Not that it is much help but mine seems to as well, usually after getting the latest update but a re-boot seems to sort it out. What with this and other problems (see click here) I am thinking of ditching it and going with Avast!
OnePlus 5T review: Hands-on
Illustrator Andrés Lozano on his improv line work, brazen use of colours & hand sketching
iPhone X review
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