TP Link Archer AC5400X Internet from router stops but router still gets internet
I searched the forums and couldn't find anyone with my issue, so please excuse me if this was posted before.
TL;DR:
Internet to WiFi and LAN devices occasionally drops but router still receives internet. When logged in, internet status is fine, built in internet speed test in router confirms good connection. Nothing in system log. Happens once or twice a week, sometimes in afternoon, sometimes middle of night, and lasts about 5 to 30 minutes.
The details:
My internet connection kept dropping about once a week in the middle of the night (1-3am) - thought ISP was to blame, but ISP was showing normal connection. ISP suggested I check router next time internet drops.
Internet dropped this afternoon. Opened the browser and without logging in to router, I was auto-forwarded to a TP-Link page that said my router had a WAN problem (this is something that happens every time connection drops). Logged in to router, checked on status of internet and it was working. I did a speed test within the router itself, and the speed test returned with 200+Mbps down and 400+Mbps up (a bit low, but normal) but my devices were still not connected to internet even though router was connected as confirmed by speed test.
I have latest firmware. Not sure if maybe it's a specific setting. ISP suggested it might be a scheduled reboot of router. I checked scheduled reboot setting and it is off.
Things I do different from default settings (in case any of this helps):
I changed router IP to 192.168.1.1 instead of default 192.168.0.1
Set DHCP range to .100-.200
I like organized IP settings, so all of my "important" devices are set to reserved IP settings within router's DHCP setting (but fall outside of the 100-200 range of DHCP). There are no redundancies - all connected device IP's are unique.
I have QoS activated prioritizing a few devices (3, to be exact) but not prioritizing specific types (i.e. gaming/streaming/etc.), just devices
Router has USB hard drive connected to it to use over network
Router is connected directly to ISP's gigabit hardware, but from router I have a LOT of connections that spread to different rooms of my house - I have 1 8-port switch and 1 5-port switch connected to router and then another 8 port switch connected to the 5-port that is connected to the router. The direct 8 port switch is connected to 3 devices, the 5 port switch is (usually) connected just to the 8 port which powers 1 more device, so all in all most of the time there are 4 devices connected to LAN via switches. I thought maybe the switches were to blame, BUT a) this issue has happened before I got switches, and b) the switches would have no effect on the WiFi and the WiFi drops as well as the LAN.
Any help is highly appreciated. Most of the time, the internet works great, but it just randomly drops and most of the time it's during gaming, which is the worst time to drop a connection.
Thank you!