here is my recent experience attempt to play MOD on this game. (I play on JP version, but this NA thread is more active, so I'll leave it here)
I conducted the trials with my account binded already, so I can just transfer back (every 48hrs).
First, you try PS version, till your device able to log in and play smoothly or able to create new account. (on this part, my Android 12 device keep get connection error, while my Android 10 was able to playback somehow)
Once you able to log in smoothly, close the app, relaunch the game few times to make sure still able to log in normally.
Once above steps confirmed / checked, then I transfer my old account back on PS version.
Relaunch game few times, able to log in with my account data and all.
My device is rooted Android 10 and lucky patcher patched.
I simply install MOD over PS version. (uninstall PS, fresh install MOD version would result connection error for me).
Then, finally able to game play with MOD effects and all.
But, upon my recent trials. Once conducted battles with MOD effect, After that game session, app closed, relaunch, you will encounter connection error.
I can only guess that gameplay with MOD will send a flag to the server, and void your app's server connection.
Currently, my account is not banned per say. Simply app on device not able to connect server (error 11015) no more.
After 2~3 days, I repeat the above steps, still able to transfer the same account and on same Android 10 device.
Hope my above experience can help some that's having connection error troubles there.