Original key function not being properly eaten in XBMC

[Gintaras]

Probably does not eat user-pressed keys when the macro presses keys simultaneously. It may happen when using non-low-level hook, because then there is no reliable way to know key source - user-pressed or QM-pressed.

Use opt keymark 1

Function VolumeUp
Trigger B     

Code:

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opt keymark 1
key y

This also should work:
Function VolumeUp
Trigger B     

Code:

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spe 10
BlockInput 1
key y
BlockInput 0