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You need to v-model
the computed property with the FormulateInput
instead of one way binding the value
. Here codesandbox
<FormulateInput
name="lmp_mcp_difference"
type="number"
v-model="days_difference"
label="Difference of days between LMP and Registration Date"
/>
For updating the values
property you need to assign the values
as it has lost reactivity from the vue instance.Updated codesandbox
Source:stackexchange.com