This has been a problem for some years,
This has been a problem for some years with cars and locking steering columns.
We had it happen twice with GM cars. It is the lock companies flaw in design. A friend who is a lock smith gets calls all the time to fix cars at malls, homes, etc. He told us and so did our salesman, have as few other keys and things on the key ring for the ignition as possible. I now have a key ring that allows me to detach my ignition key completely when I drive. The weight of the key ring and other kings wears out the tumblers quicker and soon there you are stuck.
So again try to use a ring that allow you to detach as much weight off the key ring as possible. I know I am not the Rocket Scientist many of you are but this I got right from the horses mouth.