Could it be possible that this only works in Indoor mode? Will try it in this mode just to see...
Ah... I was right. GPS Off Lap mode will only work in indoor mode. That's the reason why it was more convenient before when indoor mode was selectable.
Right now it lead to much confusion as the watch will automatically switch to indoor mode if you set GPS Off in GPS setting. And to be logical GPS OFF Lap should only appear in Lap Setting submenu at that time (when GPS is turned Off). And even there, you cannot quit Indoor Mode when you turn back gps on. You have to turn off the watch.
The best would be to get back indoor mode in the menu.
Here is what I propose:
-GYM > Trainer
> Interval Training
> Indoor Mode
Once in Indoor Mode:
When "on" it then enable this sub menu:
Lap distance preset: > Off
> On > Lap Distance: x.xx km
The thing is that the change has been made to solve an arborescence problematic so I am not sure if Indoor Mode can really have its own place in the watch -ideally under Gym- menu...?
As for the speed it is only viewable when the activity is over. I have asked to know if it was possible to see it during exercise (refreshed after every triggered lap) in a old post but don't remember what Geoffrey wrote about it...