Not given insulin in hospital?

I’m T1 and I’ve been in the hospital for a few days and for some reason the nurses will check my sugar before a meal, give me insulin if I’m high and then give me a meal and not give me any insulin. Then they’re surprised when I go high and I try to explain to them it’s because I need insulin for the food and they keep saying “that’s what the insulin earlier was for!” Which it wasn’t. A single unit will not cover a meal. I’ve just started sneaking my own homolog after eating. Has anyone else experienced this?