That works ok at home. Using it live from snapshots (8 snapshots) you need to go to stomp, hit the looper, record loop, then hit mode twice to get back to snapshots.
Which if you want a clean(er) loop then have a lead tone over that takes some steppin'. Then do it again to turn the loop off. I've only scratched the surface of the Helix LT so I could be missing something.
With the RC3 I hit record, hit it again & it's in payback, then I use the FS7 for one button stop.