My setup:
My problem is that sometimes (usually in the evening) the wifi doesn't work on my router 2.
I can connect (over wifi) to router 2, however sometimes I don't have a connection to the internet.
Ethernet over router 2 always can connect to the internet, even if the wifi over router 2 can't connect to the internet.
While I'm on the wifi of router 2 I can still ping local devices and visit the router admin page.
I started having this problem about 2 weeks ago. I haven't changed any settings on the routers and it worked fine for nearly a year, until now.

My problem is that sometimes (usually in the evening) the wifi doesn't work on my router 2.
I can connect (over wifi) to router 2, however sometimes I don't have a connection to the internet.
Ethernet over router 2 always can connect to the internet, even if the wifi over router 2 can't connect to the internet.
While I'm on the wifi of router 2 I can still ping local devices and visit the router admin page.
I started having this problem about 2 weeks ago. I haven't changed any settings on the routers and it worked fine for nearly a year, until now.