All boats seem to have their own difference "balance" and speed when hove-to.
I'm wondering if you had too much headsail area and were being carried too far off the wind before she would head back up. If you get borne off too much, then you're reaching and making headway. So maybe you need to keep her more "pinched up" at the low end of the heave-to 'wobble'. maybe helm more alee, to keep her more on a close reach than a beam reach, and less jib area.
It's always an experiment.