https://www.bbc.com/news/world-us-canada-43818752
and one of the most famous incidents (in the U.S.)
https://en.wikipedia.org/wiki/Aloha_Airlines_Flight_243
Both were from fatigue, but fatigue doesn't have to be a gradual thing; it could come from a single hit that causes the pressure vessel to fail at altitude.
See the whole list here
https://en.wikipedia.org/wiki/Uncontrolled_decompression#Not...