@r_c_s_ wrote:
... when using a command,
Are you using the icons
or
are you using the command line?
I think the icon is actually selected on mouse up, not on mouse down.
I have seen users start to get fast and move their mouse selection away from the icon before letting up on the button. Acts like no command selected.
Try this, select Erase, but do not let up on the button until moving the mouse away from icon.
Does this reproduct the behavior you are seeing?
Now try again, select Erase, but be sure to let up on mouse pick button before moving mouse from icon.
Does it now work as expected?
The behavior you describe sounds different than this, as it sounds like you are getting into the command. But just to be sure...
Edit: Well I did a bit more experimenting and the behavior you describe sounds more like a missed pick on first click and then you are getting a selection (crossing) that allows you to get on second pick.
Can you create a Screencast recording of your steps?
-----------------------------------------------------------------------------------------
Autodesk Inventor 2019 Certified Professional
Autodesk AutoCAD 2013 Certified Professional
Certified SolidWorks Professional