in src/plugin/fieldViews/ProseMirrorFieldView.ts [381:388]
private maybeRerenderDecorations() {
if (this.decorationsPending && this.innerEditorView) {
// This empty transaction forces the editor to rerender its decorations.
this.innerEditorView.dispatch(
this.innerEditorView.state.tr.setMeta("fromOutside", true)
);
}
}