Missing chunks in version 1.17.41 PE,Creative mode

I'm playing Pocket Edition, creative mode, on a new iPad, using version 1.17.41, which was recently updated. After the update, missing chunks have started to appear throughout my world, even destroying built structures. I've tried to save/quit and reload many times to no use. Sometimes I fly over an intact place and when I come back, the missing chunks have appeared. Please help.