never get them, on IOS 12 often see waves for bench befor switching on Velos-ID, after switching on didn’t get them

Waves will emerge if you have incomplete recovery after a hard set of say 8 reps. Then you get stopped early on say rep #3. That gives you a bit of rest and your next set you get the “Again” command for several reps. Now you’re back up to maybe 7 reps. Rinse and repeat and you’ve got a wave.

If your body isn’t working like that on that particular day, there’s no wave and you get something else.

Oh my fault, I think waves are 6-4-7-3-8-2 what I sometimes see without Velos-ID, so planned before the app know anything. I have little waves with Velos-ID mostly for squat.

Yes, that’s a wave. So you do your first set and reach your stop at the 6th rep. You rest for 3 minutes and only partially recover in that time. Next set you get stopped on the 4th rep. You rest another 3 minutes and recover better this time. Now you get stopped on the 7th rep. But that was a little more work so your recovery is likely to be incomplete after 3 minutes. And so on. That’s how the wave can emerge organically. The preprogrammed wave just tries to anticipate this cycle.