Always the same story:

Marketing: hey I'm gonna do a demo to a customer. They were asking for feature XYZ. That's ready on thr staging server right? Do you think I could use the staging server for the demo?

Devs: well feature XYZ is not 100% done. Basically just feature X is done, and it still has a few bugs. The deadline ain't for another month, since we gotta finish ABC first. I guess you could use the staging, but it has a lot of bugs.

Marketing: perfect!

*after presentation*

Marketing: the staging had so many bugs! Why didn't you tell me?! It was so embarrassing showing it to new customers! Anyway, they loved the new feature. We need it to be ready ASAP.

Devs: What?! That's gonna mess up with our schedule. You know what? Fine, but feature ABC will have to wait another month.

Marketing: Well, it'd be ideal if we could do both...

Devs: Pay for more devs or dor extra hours.

Marketing: Just do XYZ. It's a pity that you'll have to push back ABC but it's fine, XYZ is more important.

(I might ask, if it was so important, why didn't you notice so in the meeting where we had decided that ABC would be prioritized?)

*tons of working hours later*

Devs: There, we finished XYZ.

Marketing: Yay! Wow, this month we'll have two major features done: ABC and XYZ!

Devs: No, ABC is not done yet.

Marketing: What? But the deadline was this week.

Devs: It was, but then you decided to prioritize XYZ and we said we had to push back ABC to get XYZ ready, and you agreed.

Marketing: Did we? Fine. But do it quick.

Marketing and their mood swings.