Does PerObjectConfig work when loading

Is PerObjectConfig supposed to work when loading (not saving) the configuration? I did a lot of tries but never succedded to make it work. It worked for a per class basis when droping PerObjectConfig I also generated a simple configuration using this->SaveConfig() with PerObjectConfig in order to be sure I have no syntax errors.

; Works when no PerObjectConfig
[/Script/MyProject.ActManager]
SomeProperty=SomeValue

; Doesn't work
[ActManager2 ActManager]
SomeProperty=SomeValue