The editor disappears on browser refresh if the @PreserveOnRefresh annotation is present on application. :((
Temporary fix (hack):
quillEditor.addAttachListener(e -> {
quillEditor.getToolbarConfigurator().initEditor();
element.getNode().runWhenAttached(ui -> {
element.executeJs("$0.setHtml($1)", element, quillEditorValue);
});
});