I'm choosing note value 1/1 - whole bar.
I've also tried setting to 60BPM and delay time to 4 seconds (instead of using a note division), which should give a repeat on precisely every fourth flash of the light, but within 30 seconds the tap light and delay repeats are significantly out of step and get progressively further apart as the feedback decays. The delay repeats are faster than the light.
So it makes no difference if I choose tap tempo, set tempo manually, use delay time or note division - the tap light and delay time are not in sync.
Setting tempo to 60.2 and delay time to 4 seconds seems to keep the two in sync for very much longer. This suggests that somewhere in the Helix the delay time to tempo calculation is inaccurate.
I could at least please do with someone else confirming that their Helix behaves in the same way.