Switch- Minecraft closed due to an error

Crashes and sends player out of game with a window to notify you that the game crashed because of an error. I can’t remember what it specifically said before the (3) crashes I’ve had because it won’t let you take a screenshot when it occurs. So far there are no indications before it happens like lag. I have lost time spent in the game because of the only manual save happening when you are leaving the game. Because of auto save I’ve lost a llama and lead as well as other progress that I thought had already been auto saved. I had a crash in survival (no texture pack, Steve skin), and 2 crashes in creative and adventure mode both in the adventure time map and texture pack. 

Crashed again today I’ve attached a video of the err