Shortcode icon not showing in WYSIWYG editor

[hdpero]

When entering a newly created page inside of TinyMce editor shortcode icon doesn't show up, like shown in image:

But you can still click on it and it will open up a Shortcodeable modal windows, and when you exit that window icon shows up.
These happens in both Chrome & Firefox browsers. IE, Edge, Opera & Safari hasn't been tested.

When I inspected Request waterfall in Firebug, I saw that Shortcode icon image hasn't been called, like shown in image:

, but when I clicked on place where Shortcode icon should be (as shown on first image) icon image has been loaded:

My guess is somewhere in runtime of TinyMce script Shortcodeable icon image has not been called during initial rendering, but after (sense it shows after clicking on place where is should be).

[sheadawson]

Strange, I don't get this issue. Does this happen for anyone else?