--- a/src/xstate/mod.rs	2026-10-10 02:55:59.663368893 +0300
+++ b/src/xstate/mod.rs	2026-10-10 02:55:59.699369500 +0300
@@ -1189,7 +1189,9 @@
             match ty {
                 x if x == window_atoms.normal => return WindowRole::Toplevel,
                 x if x == window_atoms.dialog => {
-                    return WindowRole::new_basic(self.has_transient_for && motif_no_decor);
+                    return WindowRole::new_basic(
+                        self.has_transient_for && motif_no_decor && forced_size,
+                    );
                 }
                 x if x == window_atoms.utility => {
                     return WindowRole::new_basic(motif_no_decor && forced_size);
--- a/src/xstate/tests.rs	2026-10-10 02:55:59.665368927 +0300
+++ b/src/xstate/tests.rs	2026-10-10 02:56:08.382515889 +0300
@@ -473,6 +473,33 @@
         assert_eq!(win.guess_window_role(&win_types), WindowRole::Popup);
     }
 
+    // https://github.com/Supreeeme/xwayland-satellite/issues/470
+    // A DIALOG with TRANSIENT_FOR and no Motif decorations which is resizable
+    // (min_size != max_size) should be a top-level, mirroring the UTILITY fix in #383.
+    // Otherwise the popup parent resolves to a hidden WM_CLIENT_LEADER and the
+    // window never appears (e.g. DaVinci Resolve's Project Manager).
+    // Window attributes are taken from the full xprop posted in #470 (DIALOG +
+    // NORMAL window types, _MOTIF_WM_HINTS decorations=0, resizable normal hints).
+    #[test]
+    fn davinci_resolve_project_manager() {
+        let win_types = WindowTypes::new();
+        let wm_normal_hints = WmNormalHints::new()
+            .user_pos(978, 270)
+            .user_size(1884, 1620)
+            .min_size(910, 640)
+            .max_size(2880, 1620)
+            .win_gravity(Gravity::Static);
+        let win = WindowRoleHeuristics {
+            has_transient_for: true,
+            motif_wm_hints: Some(motif::Hints::from([0x2_u32, 0x1, 0, 0, 0].as_slice())),
+            window_types: vec![win_types.dialog, win_types.normal],
+            wm_normal_hints: Some(wm_normal_hints.into()),
+            wm_class: Some("resolve".into()),
+            ..Default::default()
+        };
+        assert_eq!(win.guess_window_role(&win_types), WindowRole::Toplevel);
+    }
+
     // https://github.com/Supreeeme/xwayland-satellite/pull/390
     // With Motif decorations, even a dialog with TRANSIENT_FOR is better treated as a top-level
     #[test]