I suspect that the battery is about to die. You might want to read the post of @tickerguy here:
www.mazda6club.com
It's a long post but he made a summary after that.
?

Does the push button start just make it hard to jump...
Hi everyone, I have a 15 Mazda6 Touring and I'm starting to have more frequent battery issues and I'm thinking it's time to replace it. Last night I figure I had left my dome light on for no more than 1.5 hrs and I figured I was fine. Left it alone and I couldn't start it this morning. I got...
It's a long post but he made a summary after that.
?