Shadcn tabs automatically change value when changing component state

[Wizzel1]

I have a shadcn Sheet with a Tabs Component:

<script lang="ts">
    export let open = false;

    let selectedAdvancedDesigns = new Set<DesignManagementItemMeta>();
    let selectedTab: "standard" | "advanced" = "standard";

</script>

<Sheet.Root bind:open>
    <Sheet.Content>
        <Tabs.Root bind:value={selectedTab}>
            <Tabs.List class="w-full justify-center">
                <Tabs.Trigger value="standard">Standard</Tabs.Trigger>
                <Tabs.Trigger value="advanced">Advanced</Tabs.Trigger>
            </Tabs.List>

            <Tabs.Content value="standard">
                ///content for the standard tab
            </Tabs.Content>

            <Tabs.Content value="advanced">
                <div class="some-styling">
                      {#if selectedAdvancedDesigns.size > 0}
                            <IconButton
                                icon={{ icon: LucideX }}
                                variant="tertiarydestructive"
                                on:click={() => {
                                    selectedAdvancedDesigns = new Set();
                                    //clicking this button makes the tab go to the "standard" value
                                }}
                            />
                        {/if}
                </div>          
            </Tabs.Content>
        </Tabs.Root>
        
    </Sheet.Content>
</Sheet.Root>

for some reason the tab jumps to "standard" when I click a certain button. If I comment out the code inside the callback selectedAdvancedDesigns = new Set() this doesn't happen. Any idea what I am doing wrong?