Engine stall when braking (Mazda2 Skyactiv 2016)

[shah2310]

I have mazda 2 skyactiv 2016. First issue i notice when i'm using I-STOP the engine rattle and continue to stall while pressing brake.

then i shut down the I-STOP it run fine.

After few days, the engine begin to stall begin to rattle and continue to stall when pressing brake. the rpm begin to dance (UP AND DOWN) (Without using I-STOP)