diff --git a/ui/frontend/src/lib/ui/sheet-dismiss.ts b/ui/frontend/src/lib/ui/sheet-dismiss.ts
index f6c994a..5bcca66 100644
--- a/ui/frontend/src/lib/ui/sheet-dismiss.ts
+++ b/ui/frontend/src/lib/ui/sheet-dismiss.ts
@@ -25,7 +25,18 @@ export function sheetDismiss(
 	let opts = options;
 	const handle = node.querySelector<HTMLElement>("[data-sheet-handle]") ?? node;
 
+	// The sheet stays mounted on desktop but is hidden by a media query
+	// (`display: none`); the document-level tap-outside listener fires
+	// regardless of that, so it must no-op while the sheet is not shown,
+	// or any click would dismiss the current selection. `offsetParent` is
+	// unreliable here (it is null for `position: fixed`), so check the
+	// computed display directly.
+	function isHidden(): boolean {
+		return getComputedStyle(node).display === "none";
+	}
+
 	function onDocumentPointerDown(event: PointerEvent): void {
+		if (isHidden()) return;
 		const target = event.target;
 		if (target instanceof Node && node.contains(target)) return;
 		opts.onDismiss();