I have had issues with my RT-AC3100 too. I seem to have narrowed it down to the 2.4ghz radio going up and down. I reverted back to the latest stock firmware and everything works fine. Let me know if you come up with anything.
I can still go back to the stock firmware and everything works fine, but I really want to use the extra features in Merlin. I use the Parental Controls and time scheduling, but not on the devices that are using 2.4ghz. Here is what has happened so far this morning.
8am - Unplugged router for...
I have the same problem with by brand new AC3100. If I factory reset it back to the latest stock it works fine. It is happening wit .17 and .16 but that is far back as I have tested. I have done countless factory resets and restores, unplugged the power for a few minutes, etc. It seems like the...