Experimental Gameplay Won't Copy World

Prior information:

I've already looked through this issue, and found nothing that had helped since it seemed to be a storage issue for most; none of the solutions helped my case

I've mass deleted worlds and downloaded texture/behaviour packs to save storage space

My device is an iPad Pro 12.9

My remaining device storage is 78.1 GB

I do not have a computer to back my minecraft worlds up to

Current storage in Minecraft:

Worlds - 427.1 MB, Resource packs - 70.6 MB, Behaviour packs - 1.1 MB

 

Bug:

I like using add-ons, and I know how to start up an experimental gameplay world. I have an issue where if I attempt to copy my world (71.5 MB), it loads up to 40%, stops, an give the message "Failed to create a copy of your world ". If I clear Minecraft out of my app history and reload it, there is a copy of my world, but experimental gameplay is off. The below images are showing the situation.