No sound on buttonpress on Android 4.0

'Make sound on tap' not working properly.

When this setting is enabled, i suppose that with every buttonpress a clicksound must be heared. When pressing a button i hear 1 clicksound, when a button is pressed within 4 sec. after each other, click sound is ok. When a button is pressed after 4 sec. or more, no sound is produced, sometimes at random i hear the click.
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