Why does my phone randomly reboot when i close apps with the recent apps button on my s7 edge

[Kingmertovic]

Sometimes when i'm watching youtube from the youtube app and close the app by using the recent apps button it randomly reboots so far it has only happend with the youtube app and it doesn't happen always it happens like every two days. I already wiped the cache partition and the youtube app cache. So i was wondering if i could do anything else besides factory reset ill keep that for last.