It's like mothering a toddler: take a fast little personal trip away and you may hear a desperate creature pounding on the bathroom door, sobbing, until you rejoin them.
Image borrowed from We Too Were Children - modified
If copyright holder (if any) wishes removal, gladly! Just ask.
This mommy-don't-leave! problem gets worse in film. I once prepared the set for shooting, then told the crew and AD that I absolutely had to get something at Home Depot and that I would absolutely be back in thirty minutes. Ten minutes later, when I was deep into the plumbing aisle, I got a frantic call because a) shooting had moved and now, instead of the prepped set, they wanted to shoot another area entirely and b) in that other area... how - please God! how?! - should the hand towel be folded?!!!
I kid you not.
But if this sounds like these calls are unwelcome - far from it. Calls are much more welcome than what happens when no one calls!