Product and version: FMS14 FMS15 (Maybe 13 as well)
OS and version: OS X and Win Server 2012
Browser and version: Safari .1.1 (11601.6.17) and Chrome Version 51.0.2704.103 (64-bit)
Description: Triangle shows in WebDirect when Popover background set to None in Inspector
How to replicate: Set popover background set to "None" in Inspector
Workaround Set background to solid color of transparent.