I did see that post and did not have anything to add to SB's answer.
Kinda glad I read it, 'cause my Wife has enough keys on her's to not only lock it in start position, but bust the key right off.
I did notice one time on mine that, because of the tunnel of the ignition switch with the trim, that with only a few keys , you can get it jamed in there. Happened to me , but only once.
My guess would be just dry lube.