I think it's very unstable now, because i remember a long time ago i can play this game LDP 9 nomrally, but now it's very unstable even for the vanilla version, i can't even pass the loading screen
I play on bluestacks emulator and it's working perfectly (for the moment).
The modded apk was updated a while ago to support 64-bit which fixed a lot of the visual bugs that the game had (quidditch uniforms being white, some UI elements not showing up etc...) and improved stability.
Depending on when the last time you played on LDP 9 was, you might have only tried the 32-bit apk on your emulator. If you want it to be a bit more stable, you could check to make sure that you have the 64-bit binaries for your emulator and that your emulator is the 64-bit version.