diff --git a/studio/frontend/src/components/ui/dropdown-menu.tsx b/studio/frontend/src/components/ui/dropdown-menu.tsx
index c4f742a164..a39651d939 100644
--- a/studio/frontend/src/components/ui/dropdown-menu.tsx
+++ b/studio/frontend/src/components/ui/dropdown-menu.tsx
@@ -46,7 +46,10 @@ function DropdownMenuContent({
         sideOffset={sideOffset}
         align={align}
         className={cn(
-          "data-open:animate-in data-closed:animate-out data-closed:fade-out-0 data-open:fade-in-0 data-closed:zoom-out-95 data-open:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 bg-popover text-popover-foreground min-w-48 rounded-lg p-1 duration-100 z-50 max-h-(--radix-dropdown-menu-content-available-height) w-[calc(var(--radix-dropdown-menu-trigger-width)_+_6px)] data-[align=start]:-translate-x-[3px] data-[align=end]:translate-x-[3px] origin-(--radix-dropdown-menu-content-transform-origin) overflow-x-hidden overflow-y-auto data-[state=closed]:overflow-hidden",
+          // The 3px alignment nudge must be margin, not translate: a transform
+          // here makes this scroll container the containing block for nested
+          // position:fixed submenu wrappers, clipping every submenu.
+          "data-open:animate-in data-closed:animate-out data-closed:fade-out-0 data-open:fade-in-0 data-closed:zoom-out-95 data-open:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 bg-popover text-popover-foreground min-w-48 rounded-lg p-1 duration-100 z-50 max-h-(--radix-dropdown-menu-content-available-height) w-[calc(var(--radix-dropdown-menu-trigger-width)_+_6px)] data-[align=start]:-ml-[3px] data-[align=end]:ml-[3px] origin-(--radix-dropdown-menu-content-transform-origin) overflow-x-hidden overflow-y-auto data-[state=closed]:overflow-hidden",
           className,
         )}
         {...props}
@@ -241,14 +244,19 @@ function DropdownMenuSubContent({
   ...props
 }: React.ComponentProps<typeof DropdownMenuPrimitive.SubContent>) {
   return (
-    <DropdownMenuPrimitive.SubContent
-      data-slot="dropdown-menu-sub-content"
-      className={cn(
-        "data-open:animate-in data-closed:animate-out data-closed:fade-out-0 data-open:fade-in-0 data-closed:zoom-out-95 data-open:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 bg-popover text-popover-foreground min-w-36 rounded-lg p-1 duration-100 z-50 origin-(--radix-dropdown-menu-content-transform-origin) overflow-hidden",
-        className,
-      )}
-      {...props}
-    />
+    // Portaled like DropdownMenuContent: rendered inline, the fixed popper
+    // wrapper is a descendant of the parent menu's scroll container, so any
+    // transform there turns on overflow clipping and hides the submenu.
+    <DropdownMenuPrimitive.Portal>
+      <DropdownMenuPrimitive.SubContent
+        data-slot="dropdown-menu-sub-content"
+        className={cn(
+          "data-open:animate-in data-closed:animate-out data-closed:fade-out-0 data-open:fade-in-0 data-closed:zoom-out-95 data-open:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 bg-popover text-popover-foreground min-w-36 rounded-lg p-1 duration-100 z-50 origin-(--radix-dropdown-menu-content-transform-origin) overflow-hidden",
+          className,
+        )}
+        {...props}
+      />
+    </DropdownMenuPrimitive.Portal>
   );
 }