I can also confirm this.
An entry:
--- [daemon]
AutomaticLoginEnable=true AutomaticLogin=<my_user> ---
in custom.conf does nothing.
But it works in gdm.conf-custom
I can also confirm this.
An entry:
---
[daemon]
AutomaticLoginE nable=true <my_user>
AutomaticLogin=
---
in custom.conf does nothing.
But it works in gdm.conf-custom