Kindred bugged or tooltip wrong

Lamb's Respite stops anyone in the zone from taking damage. The tooltip says, "Kindred creates a zone around herself that prevents allies from dying. " which is very different. What it actually does is the same as Kayle ult except instead of one person, it's a zone. Her tooltip reads, "Kayle shields an ally, making them immune to damage." which, as you can see, is very different wording to mean the same thing. Is it a bug that everyone in Lamb's Respite takes zero damage, or is that as intended?