The zoa looks completely normal. I’ve got a couple zoas that won’t shut no matter what I do. Lights out, poking them, even throughout the fragging process; completely open. I’ll take the colony out, frag it, and the freshly glued frags that have been totally out of the water for at least 2 minutes now are still wide open.
“Umbrellaing” would be where the center of the zoa is above the skirt— so it’s inverted. This is usually caused by a lack of light and can be easily remedied but I don’t see yours doing that