2 out of 10 camera's freeze at certain time

[born2ride]

I have noticed two of my camera that do the front of home are freezing right around 7:30am .Both camera are set to record from 6:00 am to 8am on there own schedule. I found this accidentally on monday cause my son missed the bus. recording starts around 6am it freezes when it gets to the 7:30 mark on both camera everyday for past few weeks. cam1 hik2032 , cam2 is a Dahua IPC-HDW4431C-A . both are set to blue iris dvr ,direct to disc, max rate is 10fps .
Any thoughts?

 

[bdorring]

what happens when you browse to the webpage of the camera when it is frozen? Is there a valid image being displayed?