Probably a real stupid one.

The CEO plays golf with a bunch of dept leads. I'm one of the few dept leads who works remotely, and I don't play golf. So I'm frequently not on his radar (which includes things like budget and promotions too).

He had a "brilliant" idea to make a internal project that should have gone to my department. We are literally the subject matter experts. But he gave it to another department. The dept lead tried to play both sides. He wanted the project because it'll earn him brownie points with the CEO. But he tried to appease my dept by saying it's a experiment.

I didn't care. I was a bit annoyed the CEO ignored us. But my dept was in no position to take more work.

Well, by taking the project on, their department was under a lot of scrutiny. The internal tool touched everybody. They don't have UX experience. They don't know how to work collaboratively. They over engineered the hell of out it. You can't make changes without being a senior developer (which means even juniors can't contribute wtf) And worse, the CEO got pissed off that this expensive internal tool barely works. That dept lead went from "Oh we got this" to now fuming over the status of the project.

Finally, a C-level person demanded the other dept hand it over to my dept.

We took the project and rebuilt it in our technology. It took them three months, and we had it fully working in a week. Even better, my dept builds tools for non-technicals. So it was coded in a way where new features can be added by anybody, and managed by a non-engineer. My team still didn't get credit/attention from the CEO. But whatever.