I see that 4.2.3 is now in stable softwares for Flint. However, I see a lot of bugs, even in GUI, especially in Tailscale section where the options change the names to some variables, so i.e. instead of Allow access Wan, there is some variable name, when you refresh the browser, it is back to “allow access wan”.
Also, DNS leaks on Wireguard still happen from time to time, i.e. when you reboot the router which is acting as a WG client.

On the other subject, will software 4.3 have the option to choose your own headscale server, instead of hard coded Tailscale.com ?
Hope we will be able to change this from GUI?
Also, you mentioned advertise as exit node option will be available in 4.3, right?