Started game in survival, now it is in creative

I was playing on survival and when at a crafting table my phone died. When I loaded after charging the game mode had switched from survival to creative! All of what I had previously made was intact; the world was exactly how it was when my phone died but as said before, the mode is now on creative.

1. Go to a crafting table with almost dead phone
2. Let the phone die.
3. Charge the phone again and start up the game.
4. Load the same save.

Thanks!