Default Air command not showing up, hover not working as well

Hello there I would like to ask did any body ever face air command not working after rooting it(android version: 4.4)?

Situation:
1. Clicked the s pen button but air command not popping up
2. Pulled s pen out and heard the sound but air command not showing up
3. Hovered finger on lock screen but nothing happens
4. It happens oftenly
5. I have to click the power key to sleep the phone and click again to wake it then the s pen working again

Do anybody know why it happens
It's quite annoying when I want to use s pen but not working


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