on behalf of Chris, this particularly sounds like a memory allocation problem within the Android toolchain. We are aware of a problem for asset collections bigger than approx. 20MB and are currently working on fixing that. How large are your asset files (images and sounds) in total (uncompressed)?
If you’re using some jpeg files you can temporarily save them with lower quality to bypass this problem until we have a proper fix for that. I’ll keep you updated, thanks for the hint!