Updating balloon position after DOM is rendered.

src/link.js

@@ -369,6 +369,7 @@ export default class Link extends Plugin {
 		let prevSelectedLink = this._getSelectedLinkElement();
 		let prevSelectionParent = getSelectionParent();
 
+		// Use 'low' priority to update position after view is rendered to the DOM.
 		this.listenTo( editingView, 'render', () => {
 			const selectedLink = this._getSelectedLinkElement();
 			const selectionParent = getSelectionParent();
@@ -399,7 +400,7 @@ export default class Link extends Plugin {
 
 			prevSelectedLink = selectedLink;
 			prevSelectionParent = selectionParent;
-		} );
+		}, { priority: 'low' } );
 
 		function getSelectionParent() {
 			return editingView.document.selection.focus.getAncestors()

tests/link.js

@@ -20,6 +20,7 @@ import ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';
 
 import Range from '@ckeditor/ckeditor5-engine/src/view/range';
 import ClickObserver from '@ckeditor/ckeditor5-engine/src/view/observer/clickobserver';
+import priorities from '@ckeditor/ckeditor5-utils/src/priorities';
 
 testUtils.createSinonSandbox();
 
@@ -235,7 +236,7 @@ describe( 'Link', () => {
 				viewDocument = view.document;
 			} );
 
-			it( 'should not duplicate #change listeners', () => {
+			it( 'should not duplicate #render listeners', () => {
 				setModelData( editor.model, '<paragraph>f[]oo</paragraph>' );
 
 				const spy = testUtils.sinon.stub( balloon, 'updatePosition' ).returns( {} );
@@ -249,6 +250,21 @@ describe( 'Link', () => {
 				sinon.assert.calledTwice( spy );
 			} );
 
+			it( 'should update position on #render with low priority', () => {
+				setModelData( editor.model, '<paragraph>f[]oo</paragraph>' );
+				linkFeature._showUI();
+
+				const spyBefore = sinon.spy();
+				const spy = sinon.spy( balloon, 'updatePosition' );
+				const spyAfter = sinon.spy();
+
+				view.on( 'render', spyBefore, { priority: priorities.get( 'low' ) + 1 } );
+				view.on( 'render', spyAfter, { priority: 'low' } );
+				view.fire( 'render' );
+
+				sinon.assert.callOrder( spyBefore, spy, spyAfter );
+			} );
+
 			// https://github.com/ckeditor/ckeditor5-link/issues/113
 			it( 'updates the position of the panel – editing a link, then the selection remains in the link', () => {
 				setModelData( editor.model, '<paragraph><$text linkHref="url">f[]oo</$text></paragraph>' );