I'm still having random issues with this. Seems like half the time when I go in to edit/create a call to a method in my class that the documentation in the tooltip is gone. Sometimes I can switch tabs or save or something and they come back, but usually I have to restart B4A. It isn't a matter of editing the class or special chars anymore either- Class hasn't been touched and no char issues...and they do load initially. When exactly do they get created or recreated/what event triggers their creation (or could be causing their removal)? If there was some action I could take to cause it to recreate them and show them or something not to do to prevent them going away it would be much better than restarting B4A.
I also encountered several cases where the documentation is not get updated. Though it is not gone, just not updated. Reloading your project should fix the updating issue.
I'm not sure that this is the same issue that you are describing.
I had issues before with it not updating when I changed the sub or the comments and usually changing tabs/active files or saving seemed to fix that. This is all comments for every sub gone (Even simple single line < 5 word things and the built in Initialize sub, etc).
They seem to be fine when first opening then about mid day they start vanishing. Especially if I let it sit there over lunch or do other things in a different application. I'd say about 80% of the time it is when going back to edit existing code- I'll delete and retype a space or comma in the parameters of the sub to get it to popup and all that the tooltip contains is the sub definition without the comments.
Just now I had B4A open before coming here and the tooltips were fine. I typed the message above, read a few threads, and downloaded the GameView Library and Tutorial. Upon returning to B4A they are now not there.