There should be no need to await.

That is because the queue handler will, in theory, only ever
process one event at a time.

lib/www/server/events/handlers/report-line-change-time.js

@@ -294,7 +294,7 @@ class ReportLineChangeTime {
 			ALERT("ReportLineChangeTime queue full at", this.queue.length);
 		}
 
-		await this.processQueue();
+		this.processQueue();
 	}
 }