Steam overlay works in standalone editor, but not in test build

I’ve gone through the settings to add the Steam SDK, and when I run the game as a standalone editor the Steam notification pops up just fine, and I can hit shift + tab to see the overlay. However, when I package my project to test it, the Steam notification does not pop up, and the overlay won’t appear upon hitting shift + tab. Is this the expected behavior or am I doing something wrong here?

I have this same problem, did you even mange to fix it?