My Asus RT-AC58U router has 2 problem:
Its 2.4G and 5G signal stops broadcasting at 9:00 p.m. every evening. Sometimes it will recover in few minutes and all my devices will catch the network again. Sometimes a power on reset is needed.
I have a Huawei Nova 2i smart phone which can never find the 5G network.
I updated the firmware of the router today and reset it to factory default, but that had no effect on the problems.