same here! I'm having to migrate and replay all my favorites as they fall back on that buggy joi-crash thing.
Honestly, Im not sure if this is possible to make an obb file for renpy game. Actualy, I didnt met any renpy game for adroid with obb for now and also I talked with one developer who told me that this is impossible to make renpy game this way with currently avalable programms. Probably it is possible to make it manualy, but I imagine that this will be a huge ammount of work.