It’s like a never-ending game of Whack-a-Mole 🔨 🦔. They pop up with a "minor issue" to discuss (even though you just had a meeting with them) or decide that after-hours is the perfect moment to talk about a triviality, which is often something that could wait until morning.

https://blog.howareyou.work/handling-difficult-clients-in-software-development/