You turn off the bike when stopping for breaks?

[motoadve]

Like 5 minute breaks, leave it ON or turn OFF?

 

[Gary]

Steps motor automatically turns itself off after a few mins if left stationary with noforce on the cranks.
So no.
Emtb motors don't really use much battery when the bike is stationary anyway.
If you ask for battery saving purposes. switch to a no assistance mode while pedalling once in a while and you can actually save some battery. (especially so if you do some climbing with no assistance)

 

[TheBikePilot]

Nah, the only thing it’s running is the display.

 

[RobNevyn]

The Yamaha/Giant motor is the same, turns off on it's own when stationary for a few minutes.