Ping: "no route to host" but Safari can see the website

Hi there,
i have a weird problem, which I try to debug.

I can see one of my APs not in Google Chore, but see it in Safari (MacOS obviously). The AP is an TP-Link EAP225 with OpenWRT.

I can ping the AP from the main router, but my Mac tells me "ping: No route to host"

I can see the connection in thenetstat -rn

Internet:
Destination        Gateway            Flags               Netif Expire
default            192.168.22.1       UGScg                 en0
127                127.0.0.1          UCS                   lo0
127.0.0.1          127.0.0.1          UH                    lo0
169.254            link#12            UCS                   en0      !
192.168.22         link#12            UCS                   en0      !
192.168.22.1/32    link#12            UCS                   en0      !
192.168.22.1       cc:32:e5:84:9b:bf  UHLWIir               en0   1199
192.168.22.2       34:60:f9:a9:e9:b8  UHLWIi                en0    554

Main router 192.168.22.1, AP 192.168.22.2

Any idea what to do, how to debug? All other devices I tested are visible, just not this one.

Please provide the full output of.your ping results (i.e., what IP along the route provided the no route response).

To be clear, is any OpenWrt device acting as a router?

What's running on the 'main router'?

To be clear, you're pinging the AP and getting this error?