I believe I´ve found a bug. :-)
SMF 2.1.1, Chrome, default theme, english, no mods.
In a users profile, you can "Report this member", if you find the profile offensive.
When you submit the report, you are returned to the profile and thats it.
You do not get any confirmation, that the report was successfully send or any info about what will happen next.
Not necessarily a bug, but definitely something that could be improved upon if that is how it behaves.
Tested, confirmed behaviour - And I agree, some sort of confirmation could be useful for the users.
Tracked as #7381 (https://github.com/SimpleMachines/SMF2.1/issues/7381)