Multi select dropdown cleaning option after selection

I have a dropdown multiselect widget built with int option values and string option labels from two lists.

accountId: [23, 45]
accountName: ["Dotted","Pixxel"]

The problem starts when I select any option from the dropdown. The widget just turn to hide the option I selected, when I just wanted it to be unselected.

I use the account dropdown selection just to update other variable that I use in other scenarios...

Here is a video of what happens. https://www.loom.com/share/08f57b0dfba94ba9b642bd2ddf3f3af7?sid=bb6e9adc-23df-4488-b6f3-35776eab2fbb