fix: group meta

src/main/frontend/handler/whiteboard.cljs

@@ -153,13 +153,14 @@
         (compute-tx app tl-page new-id-nonces db-id-nonces page-name replace?)
         tx-data (concat delete-blocks [page-block] upserted-blocks)
         new-shapes (get-in metadata [:data :new-shapes])
+        deleted-shapes (get-in metadata [:data :deleted-shapes])
         metadata' (cond
                     ;; group
                     (some #(= "group" (:type %)) new-shapes)
                     (assoc metadata :whiteboard/op :group)
 
                     ;; ungroup
-                    (every? #(= "group" (:type %)) (get-in metadata [:data :deleted-shapes]))
+                    (and (not-empty deleted-shapes) (every? #(= "group" (:type %)) deleted-shapes))
                     (assoc metadata :whiteboard/op :un-group)
 
                     ;; arrow