Live and historical query

Hello, I use Telegraf to ingest udp sensor data to questdb and Grafana live websocket simultaneously. In the dashboard panels I can either configure a query or a live measurement and both works on its own. When I try to combine both approaches into a mixed datasource panel, nothing is drawn but the refresh circle arrows turn endlessly. Does this mean that the current graphs are not yet capable of combining live and historical query data or am I misconfiguring something? Thanks for your answer!