I tried to do some searching on "intention" or "lightbulb" and "disappears" but couldn't find anything related, so forgive me if my searching is inadequate.
I've tried this under both 6.0.2 and the 6.0.3 beta (build 6140)
I'm having an issue with the intention lightbulb disappearing whenever my cursor no longer is hovering over an error. For example, if I type a reference to a class field that I've not yet created (this.newField) it hilights the field red. If I mouse over the red field name, I get the "error intention" bulb. Usually I can just move my pointer over the bulb, click the bulb and select the drop down option. However, as soon as my mouse pointer is no longer over the red field name, the bulb disappears, never allowing me to click it. This, of course, devolves into Pavlovian behavior where I try to move my mouse pointer fast enough to click the bulb before it disappears.
Is there some simple fix or something I need to change -- or is this an actual bug that needs to be reported?