Yes, mines been doing it since i got the phone in April and has been way worse since the 13 update.
I did all the normal fixes, cache wipe, safe mode, factory reset but nothing worked. I've just today had confirmation from Samsung on the members app that there is a problem with the CPU and its being looked at by an engineer this week.
Hopefully the direct 13 related issue gets patched soon too.
Mine been doing it, really bad a one point I couldn't use it was like a useless paper weight!! Was restarting every 5 mins So I sent to Vodafone to see if they could find the issue, but this stupid phone decided it wasn't going to restart in there hands!! Like it suddenly felt better!! Vodafone said they couldn't find a issue with the phone and sent it back to me, but as soon as I turned it on it started doing it again!! Now I'm screen shooting the error message that comes up on Samsung members after it happens, to gather evidence for when I send it off again if the next update dont fix the problem!!