I have an iPhone 8 plus. Ever since the 1.6 update a slightly old world has been crashing. It seams to be the only one. I created the world late May when the first part of the Aquatic Update came to Bedrock Edition. However since August 28 after updating the game my world crashes. 

To describe the crash: I log into my Minecraft world, move a few blocks in game, then my game flashes then crashes. 

I'm at a loss of what to do, it's a creative world that I have been playing every day since its creation. I don't want to loose it so any help is welcome. 

Ps. Since I'm playing on my phone I don't know how to attach a copy of the world. So any advice is welcome.

Pss. I just reopened my world in the bug fix update and wanted to say thanks a million. I can finally get back into my world. Took a screen shot to commemorate the moment.