After WIFI setup with static IP, no connecltion without LAN cable

Configuration
1

I just setup a completely new RPI3+ HassOS instance. Only SSH & Web terminal add-on was installed.
After boot up, I can connect perfectly via LAN cable.
After setup WIFI connection and static IP address and reboot, I can connect via LAN calbe and also via WIFI.
I used this guide: Guide: Connecting Pi with Home Assistant OS to wifi (or other networking changes)

If I disconnect LAN cable, it is stop communication on WIFI as well. Not possible to connect via WIFI. Even if I set up DNS and GATEWAY (my router is using 192.168.1.1).

USB stick and my-network file setup method is not working at all for me. Does nothing.

Any idea or suggestion?

2

Check the wifi and Ethernet profiles you’ve made. Look at the IP addresses for both. Are they the same?

3

Still not working after reading through a hell of a lot of things.
I do not know how to check the profile for ethernet and wifi…
IP addresses are different of course.

So, how to check the profiles?
Also, what do I have to check?
What should I look for?

4

I have exactly same problem. Even when only wifi is configured and ethernet disabled, I can still connect to wifi only with ethernet cable plugged in, which gives me impression that wifi is only routed through eth0

5

I also have the same problem. Is there a solution for that?
[RPi 4, HA 32bit core-2021.5.4]