What is Your MAJOR Malfunction?

Back in the olden days, when I began shooting, I was pretty good on cleaning my firearms immediately upon returning from the range, or the desert.
And my shooting buddies and I usually would retire to my place, clean the guns, put the guns away, THEN break out the beer…
It’s always better to carry a clean, properly-lubed/maintained firearm, just in case it’s needed.
And being somewhat obsessive/compulsive, I’m prone to do it, anyway.
But, fatigue and pain crept in after yesterday’s shoot (as well as a few beers with lunch) and I put off cleaning my carry 1911 until today.
Fortunately, I’d no plans to go anywhere.
I didn’t malfunction yesterday (except the usual medical stuff), but my carry gun had a malf.  For a short string, my slide refused to lock back!  I thought it might be my reloads, new mags, or perhaps the plunger spring had left for greener pastures (?)
A quick examination determined my Armand Swenson Ambidextrous Safety had worked itself loose enough to move slightly to port, negating the proper functioning of the spring plunger, and the slide lock.  It snapped back into place, and we were in action, again.
When I clean her today, I’ll make certain to lightly peen the safety to make certain.  Gee, first malf EVER in probably 20,000 rounds over 29 years!  I can live with that.
And the new Metalform mags performed without a hiccup.  I’m very pleased.