Filemaker 13, Mac, OS X10.10.3
In the attached file, the first time you click on the blue button, the popover that appears will briefly display a vertical scroll bar.
It happens on all portal lines except the first one. Subsequent clicks on the button will show the popup normally (no scrollbar flashing).
Clicking on "Reset problem" will, well, I guess you guessed, reset the problem.
Any advice about how to get rid of this annoyance ?