Random stuck and reboots

[Bumble]

Well since i got the phone for 4-5 days, 3-4 times till now the phone suddenly is stucking on apps random and reboots... This is happening on the 4.12.26 rom and once on the last... Before i updated to the last rom i made clear flash on everything and than flashed the newest rom... Anyone experienced similar problem?

Sent from my MI 4W