When did it become so painful to move a letter from subdirectory to Inbox?

I’ve just tried to move a letter from subdirectory (automatic placement) to Inbox, and I was surprised to see that it’s impossible to do from an app, or a mobile site version! That is extremely inconvenient, folks, could you revisit this experience, please?

Dethariel92 about Gmail - Email by Google, v5.0.171217