I have had a Asus RT-ARCH13 wireless router running for a month now. I recently upgraded to 19.07.7. Yesterday I added a second RT-ARCH13 that I bought used on Ebay. I configured it using the Dumb AP document on the OpenWRT documentation site.
I connect the Dumb AP to the original Asus. I get on my PC, which is connected to the original Asus via a cable. When I ping the Dumb AP, it drops a lot of pings. When I connect the Dumb AP directly to my PC using an ethernet cable, pings are 100% successful.
I went through the Dumb AP configuration a couple times, and it all looks good. Any ideas on why the Dumb AP drops pings when connected to the main wireless router?