RE: Custom Help Panes - Still in Public Preview?
Yes this seems to be an issue. If you scroll down and then click on the balloon text, it will start showing again. Looks like there are a few bugs in this feature right now.
I have also observed similar issue when I add the couch marks or balloons to a business process flow.
Also, as per my experience, if you add too many sections in the help panel, the form load becomes really slow.