I cannot response due to my reputation points is still low, but i think you are experimenting a life cicle issue, i mean, you try to fetch and place data to your variables, but your component is already mounted. Is like:

(example)

var = null

mounted texfield: label = null

var = await dataFromStore

overall, your var are setted after the textfield render

try with the method onBeforeMounted instead of onMounted to set your async data