Study time is way off

I know this has been posted before but does anyone have a solid idea of why this happens?

Every now and then my daily study time will randomly be way off. Yesterday somehow it logged my study time as over 7 hours which is way over what I actually did.

Kind of annoying as I like tracking my study time as It keeps me motivated.

Can you please reach us on support@lingq.com? We will need some additional details from you to investigate this further. Thanks.