Hey JuniJunuo, I have good news! Just updated the apk to V011
Now you only load the last 10 chat bubbles by default, that should help a little bit with your issue, if you have played too much in one session you can reset the game and it's going to be faster (Not the best solution but should help a bit)
One note: If you decide to update the game you will need to replay Rayne's story, but photos and hearts should still be there