All my glocks (and Baer 1911's) will not return to battery if you ride the slide or otherwise improperly operate the pistol (jam it into someones gut or into a car window for example). Good news is it will not blow up in your face and fire out of battery. Revolvers are better for that scenario.
Go run 1000 rounds through it and this will become a non-issue. Mine is on the 3500 mark or so with zero issues.
Seems like the more expensive "high end" pistols just make my old G17 seem so much better..