Got confirmed from Zebra. 

"This confirms that your application has code which is enabling the laser beam. Your application will override datawedge and datawedge should be disabled if your app is controlling the laser.

My recommendation would be to follow up with Quickbooks. Quickbooks would need to review the code which is enabling the laser and verify if Interleaved 2of5 is enabled and if the length is set 0-55."

Just like I clarify above, Warehouse Manager App directly access build-in scaner and no where to change setting.