The /hud command is not hiding just 1 visual element, it is hiding all visual elements, even if you only place 1 element when typing the command.
Steps to Reproduce
Enter command /hud @a hide Hotbar (or any other visual element)
Expected Result
The command should only hide the hotbar, nothing else.
Observed Result
All HUD elements are hidden
Your report does not contain enough information to understand or reproduce the problem.
Please avoid general terms like "bugged" and instead, briefly state what is specifically wrong.
Please add the following information to the Description, as shown here:
Try following your steps to make sure you include everything and can still reproduce the issue yourself.
Use screenshots or video to help explain (but not replace) the above information
This report has been temporarily resolved as Awaiting Response. It will automatically reopen when you add information. Please follow the format shown and include all sections (steps, observed, expected). Reports that do not contain all of the requested information and complete steps to reproduce the issue may be closed as Incomplete. For more information please read the Bug Tracker Guidelines.
Many players find this Bug Report Creation Form useful for filling in all helpful information.