Some people are bad at working remote, and want to drag the rest of us down with them, too.
Yes, it’s a slightly different skill set to work remote. You have to be better at the written word. You can’t just roll up to someone’s desk and be like “have a minute?” (which is fucking awful anyway). You also need to be responsive and set your status appropriately. A lot of coworkers just wander off and leave their slack status as active. To my mind if you’re running an errand longer than taking a dump, you should update your status.
A response (or status!) on slack that’s like “I’m at the grocery, back in 20” is fine with me. It’s more annoying when someone wanders away with no status and is unresponsive for hours.