WowAce

What steps will reproduce the problem?
1. Install Button Facade
2. Install Entropy skin
3. Install Bartender
4. Get a pet class
5. Mount a flying mount, then take a portal to somewhere (I've done Baradin Hold)
6. Dismount.

What is the expected output? What do you see instead?
This problem just started. If you go through a portal from a flying mount, and dismount after, the pet bar spawns without icons.

This only happens with the pet bar, that I've seen (i'll put a similar bug report in for Bartender, because I'm not entirely sure if it's ButtonFacade, the skin itself, or Bartender).

Reloading the UI or resummoning the pet fix the bar to show the icons.

What version of the product are you using?
ButtonFacade v. 4.0.344-Beta
ButtonFacade Entropy v. 4.0.64-Beta
Bartender4 v. 4.4.19

Do you have an error log of what happened?
There are no errors.

Please provide any additional information below.
Attaching a screenshot to show what I'm talking about.

In case the photo isn't very clear, there is a border on those icons; its the icons themselves that aren't showing.

Edit:

This is actually an issue with the default UI.

http://us.battle.net/wow/en/forum/topic/2973253044