Some1: Can I call you?
Me: Any issue?
Some1: Yeah, need some clarifications.
Me: On, What?

C'mon, why on earth ppl can't provide some context before jumping into a call

Yeah, this really bugs me. You have literally no idea what to expect, or for how long you're going to be stuck.

I hate that, the level of stress it involve!

Either it's unimportant and I don't want a call, or it's important and I should know what is it about.

The HR in my company are doing it all the time:

"Do you have time?"

"Not right now, why?"

"Oh ok, I call you later"

But whyyyyyyy!?