December
What ends up happening a lot @Shebalba64205 is that bugs get introduced during updates, because they stepped on a previous fix. That's why it comes out of nowhere. Happens all the time. Don't ask me how to get engineers to pay better attention. Back in my day, we had a department/division test suite that would catch that sort of thing, but I doubt it exists the way it used to in the 80's & 90's. Then during Beta testing, a large group of users would beat up on the software, report back to development, and we'd fix things that way. It cost time, but created better quality products.
December
It's still happening.