Strange, I tried this on a few computers and it was the same on each one...
This is what I do:
1) Click on the screen. It registers the click properly
2) Start typing random letters non-stop
3) Left click on the screen while still typing... it doesn't register the click
4) Right click on the screen while still typing, everything works fine
5) Stop typing, then I need to double click with the left mouse button before it displays the message again