Fix many syncing issues (#952)

src/renderer/renderScene.ts

@@ -24,7 +24,7 @@ function colorForClientId(clientId: string) {
 }
 
 export function renderScene(
-  elements: readonly ExcalidrawElement[],
+  allElements: readonly ExcalidrawElement[],
   appState: AppState,
   selectionElement: ExcalidrawElement | null,
   scale: number,
@@ -49,6 +49,8 @@ export function renderScene(
     return { atLeastOneVisibleElement: false };
   }
 
+  const elements = allElements.filter(element => !element.isDeleted);
+
   const context = canvas.getContext("2d")!;
 
   // When doing calculations based on canvas width we should used normalized one