2020 Mazda CX-5 shut off on its own and was hard to restart

So get this. I’m driving home and am at a red light. Not moving fully stopped. Suddenly my car shuts off on its own. But all electronics are on except the radio turned off. This happens 2 seconds before the light turns green. I’m 2 cars back. I pissed off a lot of people by not being able to move.

I try to start it and nothing happens. I remember the car is still in drive. I put it in park. Fully then it off (dash lights were still on before this). Try to start it. It’s turning and trying to start, but won’t. Was making the sound between turning a meet and the engineer fully running. I have to hit the push start again to stop it and turn it off. Tried that many times. Same thing over and over. With the push button start, you need to keep your foot on the brake for the car to start. I randomly decided to take my foot off the brake while it’s trying to start and it starts up! Drive home fine. I have noticed recently there seems to be a bit of a lag when moving at slow speeds and try to accelerate(10mph to 35mph for example).

Oh, also, it engaged the e-brake when it shut off and I was kind of panicking thinking I couldn’t even push the car if I wanted to. Couldn’t disengage the e-brake until it finally started.

I have no idea what or why it happened. Any input from anyone that might know? I scared of driving on the highway and the same thing happens and the e-brake engages while doing 65.

Thanks!