There is a known issue where the Ras-tan level takes a long time to load, and the screen is black for up to 10 seconds. Sounds like that's not what's happening

There is a known issue where the Ras-tan level takes a long time to load, and the screen is black for up to 10 seconds. Sounds like that's not what's happening to you though. Is this issue occurring for all characters? You might want to try dling the game from Google play (free ofc) and see how that works for you. The feedback is appreciated!