Canvas: Fix to run validation on change in nodes

Change-Id: Ie1798e65c83e673c90d7df556729cc509a9d2d9c
diff --git a/apps/canvas/front/src/lib/state.ts b/apps/canvas/front/src/lib/state.ts
index 0749fbb..f9c1f56 100644
--- a/apps/canvas/front/src/lib/state.ts
+++ b/apps/canvas/front/src/lib/state.ts
@@ -417,6 +417,7 @@
 		set((state) => ({
 			...state,
 			nodes,
+			messages: v(nodes),
 		}));
 	};