Chroma Hills crashes game on world generation in 128x mode since update to MCPE v1.9.0 World appears to load, then app crashes on world generation.

This happens in both previously and newly created worlds. Happens in both survival and creative mode. 

Reinstalling Chroma Hills resource pack did not fix. Restarting app and device did not fix. Have not reinstalled MCPE as I do not want to lose previously created worlds I’ve worked hard on. 

It will load on 64x mode however. All other resource packs I have tried load and save perfectly. Vanilla mode of course works perfectly. 

I am using iPhone XS Max running iOS 12.1.2 

I have provided as much info as I can to investigate this bug. I am not able to provide a screenshot as it is an app crash issue.  Let me know if anything else is needed. Thanks.