Prevent button event triggered by computer keyboard

I have my command buttons set to trigger events by "Click left mouse button". (PC application)

The problem is that event will also be triggered by pressing Enter on keyboard. This happens when button is first pressed by mouse. Then the same button can be turned on/off by Enter key. 

Is there any way to prevent this ?. It could create problems if anybody press keyboard by accident or is unaware of this behavior.

I have tried to turn off "Focus- show visual" without any success.

Thanks for any idea!

Hi jofi,

according to the documentation, pressing <Return> or <Space> should trigger the "Press" and "Release" events, but not "Click left mouse button". It might help you - and probably others - to report this behaviour to Siemens by creating a new support request.

Kind regards
Stefan