If you use suite with other prodocuts like vault or richtext editor the z-index of the popup used to display the help message gets overriden.
So when the form is inside a dhx window the popup message is displayed behind the window.
Unfortunately I was not able to reproduce your issue locally.
The following snippet seems to work correctly:
https://snippet.dhtmlx.com/1ut7gsgf
Could you please, provide a complete demo where the problem can be reconstructed?