Render Chunks is Stuck at 5 on iOS 6

My Minecraft PE 1.16.201 is stuck on Render 5 chunks on my iOS 6 because on Mcpe 1.16.100 is not Stuck at Render 5 Chunks it goes to 6 or 8 chunks (when i edit to make it 8 chunks but it goes to 5 over and Over Again) so could you fix that bug on iOS 6?