reset button triggers form submission (SOLVED)

I have a form in a blade file that calls a checkbox component. If submitted, the form calls a method that uses axios to save changes to the db:

        {{ Form::model($project, [
          'id' => 'project-counties',
          'class' => 'project-and counties',
          '@submit.prevent' => 'updateProject("counties")',
         ])
        }}

I want to provide a button in this form that resets the original values (any boxes that were originally checked on page load). Restoring the original values is not problem; the button calls a mapped Pinia action that replaces an array in one store with a different array in a second store.

<button @click="setForm('counties', 'counties')" >Reset</button>

But when I click the button and run this action, the values get restored. But then the form gets submitted, which I don't want; it triggers a notification ("Changes saved") that I can't control or stop.

EDIT: I am sure now that the event (below) is not triggering the submission. But I have no idea why clicking the Reset button running that Pinia action would trigger the submission method to run.

The only thing I can think of that might trigger this is that a change event is emitted by the checkbox component. I.e.,

export default {
    name: 'checkbox',
    model: {
        prop: 'checked',
        event: 'change'
    },
[...]

In devtools you can see the event:

event info
component:checkbox
event:"change"
params:Array[1]
0:Array[1]
0:1

Could this event somehow be triggering the form submission? Is there a way to prevent this? I have no event handler for this event (that I know of).