Fix stale rendering due to the lost scheduled layer updates

CHANGELOG.md

@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ## [Unreleased]
 #### 🐛 Fixed
+- Fix stale rendering (i.e. missing links after moving an endpoint until an element move) due to the lost scheduled layer updates.
 - Fix unable to scroll inside canvas components and templates when `requireCtrl` in `zoomOptions` is set `false`.
 - Disable changing an entity IRI in a form when `MetadataProvider.canModifyEntity()` disallows it.
 - Move link vertices together with source and target elements if both are selected in `Selection` component.

src/diagram/renderingState.ts

@@ -308,6 +308,15 @@ export class MutableRenderingState implements RenderingState {
     private syncUpdateLayersUpTo(lastLayer: RenderingLayer): void {
         this.layerUpdater.dispose();
 
+        // Check if we perform only a partial update and should reschedule the rest
+        let shouldReschedule = false;
+        for (let layer = (lastLayer + 1) as RenderingLayer; layer <= LAST_LAYER; layer++) {
+            const callbackSet = this.scheduledByLayer.get(layer);
+            if (callbackSet && callbackSet.size > 0) {
+                shouldReschedule = true;
+            }
+        }
+
         const toRun = new Set<() => void>();
         for (let layer = FIRST_LAYER; layer <= lastLayer; layer++) {
             const callbackSet = this.scheduledByLayer.get(layer);
@@ -325,6 +334,10 @@ export class MutableRenderingState implements RenderingState {
 
             this.source.trigger('syncUpdate', {layer});
         }
+
+        if (shouldReschedule) {
+            this.layerUpdater.call(this.runLayerUpdate);
+        }
     };
 
     ensureDecorationContainer(target: Element | Link): HTMLDivElement {