When I went into my Minecraft world it crashed and when I got back my world was gone 

luckily I had a backup but I spent hours of effort for nothing.

I understand that Minecraft isn't a perfect game but this unacceptable I shouldn't have to worry if my Minecraft world is gonna get deleted again please mojang get rid of this glitch that's all ask please I don't know if anyone else has experienced this too but please fix it cause it's a really bad glitch