It may be the Android version. Possibly the next version will fix that problem.
I don't think so. It has happened with several of my visual novels I had transferred over from my last phone. I think it is just the model itself. At least I can still download it to my laptop, but just sucks that I can't use it with my phone.
Some examples of some visual novels i can no longer use my phone for are, Adastra, Wolfstar Sins And Paradise, and House of Beef.
It seems that there is a problem with Unity and that cell phone model. Thanks for letting me know. I hope they release a patch and fix that problem.