Bad HTTP parsed: 400 Unknown Version for HttpReceiverOverHTTP

RPI3, 250GB PiDrive with OpenHabian

I’m just looking to clean up some errors I see in the logs, but I’m unsure of what binding may be causing this error:
[WARN ] [org.eclipse.jetty.http.HttpParser ] - bad HTTP parsed: 400 Unknown Version for HttpReceiverOverHTTP@397c1d(rsp=IDLE,failure=null)[HttpParser{s=RESPONSE_VERSION,0 of 0}]

Is this anything that can be ignored ?