Asus RT-AC68U locks itself from time to time.

So I was using my 68U as a wireless media bridge using Merlin 380.57 when I started. Worked perfectly aside from the fact that it would from time to time lock itself so that I had to turn it off and turn it back on from time to time, after a few days of use. No matter how much or how often it would be used. Thought I would try the 378.56_2. Same problem. So... I thought I would use it as a router instead using the same firmware. Same problem. I've set it so that it restarts itself every day...

Asus RT-AC68U locks itself from time to time.