Papa's Burgeria: Hover state change does not update button

[n0samu]

Describe the bug

In Papa's Burgeria, hovering over the Play button on the main menu does not always highlight the button as expected, and moving the mouse away doesn't immediately remove the highlight. Also, moving the mouse away does not immediately play/restart the left-to-right highlight animation on the button like it should. Here is an isolated SWF with just the menu buttons to test: BurgeriaMenuButtons.zip

Expected behavior

Here is how the button behaves in Flash Player:

• Hovering over the button immediately highlights it
• Moving the cursor away immediately removes the highlight, then plays the button's left-to-right highlight/attract animation

Affected platform

Desktop app

Operating system

Windows 10

Browser

No response

Additional information

I've bisected the issues with the highlight not being added/removed to commit fe74219 from #11638. But even before that, the left-to-right highlight/attract animation didn't immediately play when moving the mouse away from the button, so that might be a separate issue.

[n0samu]

Here is an AVM1 SWF with the exact same button: BurgeriaButtonAS2.zip

Notice that this button behaves perfectly fine. This must be an issue only with Ruffle's AVM2 button, even though ActionScript is not involved.

[n0samu]

Koutack has a similar problem - hovering over the buttons on the "level cleared" screen does not highlight them.

Ruffle:

Flash: