Why is "Hide mouse pointer while typing" so inconsistent?

[Ichinisan]

Is it just me?

Windows XP (32-bit) System at work:

Run menu: Pass
Notepad: Pass

Chrome browser

Omnibox: Fail
Text box on Google.com: Fail
Various other text boxes: Fail​

Internet Explorer (32-bit)

Address bar: Pass
Text box on Google.com: Fail
Various other text boxes: Fail​

Windows 8 (64-bit) System at home:

Run menu: Pass
Notepad: Pass

Chrome browser

Omnibox: Pass
Text box on Google.com: Fail
Various other text boxes: Fail​

Internet Explorer (64-bit)

Address bar: Fail (cursor stays visible, flickers as each letter is typed)
Text box on Google.com: Fail
Various other text boxes: Fail​

 

[Rhonda the Sly]

The setting is only used on a single, specific textbox control. The behavior you see depends on what control is being used by the application in question.

 

[Ichinisan]

The setting is only used on a single, specific textbox control. The behavior you see depends on what control is being used by the application in question.

I dunno. Some text boxes support Tab or Ctrl+I or Ctrl+Backspace while others do not -- and even though those properties differ, they still support hiding the mouse pointer when typing. These other textbox libraries should really be updated to observe the system setting.

Is Windows the only major platform with this option?