Clear Value of multi select not working


I have a multiselect component that I try to clear when a buton is pressed.
The value seems to be cleared but the visual is not updated.
"multiselectInv" is my multiselect component.
As of right now it is populated by my query "filterinventorymultiple"
as you can see in the example TEST etienne is selected
When I submit, it trigers another query that uppon success it triggers "filterinventorymultiple" and clears all fields

But it doesn't update the multi select and shows the ID of the previous selection

It resets only if I reload the entire app...