Gw2Launcher: [Proton/Linux] "Automatically enters your email/password and login" doesn't work

I know Gw2Launcher is built for windows, but before the CEF update the application was working great running it through Proton on Steam. Since then I have been unable to get the “Automatically enters your email/password and login” to work. I have changed in the “Entry method” to “Characters via post” in “Tweaks” but that didn’t work either. (builds 7254, 7195 and 7075 do not work)

While looking at the issues I found this issue linking to this fork at the bottom. Using this fork Gw2Launcher now works for “Automatically enters your email/password and login”, both with and without the -usecoherent argument (have to use -usecoherent for the TP to load without errors though).

Is there a reason why the launcher from the fork works while the main repository does’t?