Hi.
I was on final with APP armed on the AP, and fully established on the loc and GS when ATC asked me to break off and do a 360 for spacing. I tried clicking on heading-select - nothing. Switched off the autopilot, then tried going back to HS, but APP remained armed. Turned the flight directors on and off just to try something else, but APP light still on and couldn't use heading select. Is there a trick to clearing this?
Thanks,

Bob