Hi, I'm using a Redmi note 4.
The problem arose when I signed up for the beta testing of Minecraft.
I installed a texture pack (feathercloud deluxe) from a .mcpack file. I then created a survival world named My world and it worked with no problems. I then created another world named my world in creative mode and played it testing out some enchantment on Tridents. The game crashed once while I tried opening a chest in an underwater ruin. I came back, deleted the creative mode world and created a new creative world. While generating, minecraft crashed. I tried the same thing after coming back and deleting the created world and creating a new survival world. Minecraft crashed again.

The crash occurs only if I create a world after deleting a previous one. Sometimes the texture pack is removed ( without any global resources reset message) when I come back after a crash, but it happens only sometimes.
It works fine if I create a world after starting the app. But crashes if I try to create one after deleting a previous one.
And also note, I never changed the name of the world. I always created worlds without editing the name.