Is message sending not the same everywhere? (Writing a Flag Message vs Posting regularly)

I just flagged a topic and used the “Something Else” category to be able to give some details. When I sent it, the flagging dialogue just disappeared.

When regularly posting, it saves more in the way of the automated draft saving (Bottom right) and is a visible process this way.

Does the forum work like that or did that flagging just not work?

EDIT: Nevermind, the flagging was just answered.