My router: tp-link Archer A8 (US) Ver 2.20,

For several evenings in a row, my wifi network seems to disappear. 

Here's the typical series of events:

• I'm cruising the web on my desktop which is conneced via the LAN 1 port.  That's a pass through ethernet connection to the web.
• I put the desktop in sleep mode, or power it down.
• I go to bed and use my laptop which uses wifi, and discover that there is no connection to wifi.!!  Same with phone (s).!!!
• I power cycle the router, and after a few minutes, the wireless network is available.

I rarely have problems with the wifi connections  during the day .  I have several devices that use wifi.  All connect. 

The problem occurs only at night.  I usually experience of the problem around 11 pm at night.

I have already reset the router to factory settings.  

It has been happening more frequently over the last couple weeks, and when I go to bed to read, I'd like to stay in bed rather than get up to reboot the router.

Am I the only person with such a problem?