diff --git a/packages/app/src/workspaces/selection/dialog.tsx b/packages/app/src/workspaces/selection/dialog.tsx
index 69eae80f029..5d5830ba2b1 100644
--- a/packages/app/src/workspaces/selection/dialog.tsx
+++ b/packages/app/src/workspaces/selection/dialog.tsx
@@ -389,6 +389,8 @@ export function DirectoryPickerDialog(props: DirectoryPickerDialogProps) {
         <div
           class="directory-picker-browser"
           ref={container}
+          // The modal's scroll lock sees only the shadow host, not the tree's inner scroller.
+          on:touchmove={(event) => event.stopPropagation()}
           onWheel={(event) => {
             const scroller = tree
               ?.getFileTreeContainer()