Bubble Tangram

Black screen when leaving and coming back,, please fix this is very frustrating

I would like you to fix the game, after playing the game, I left it for a while, then I went back to play it, I noticed that the screen blank and won’t load, so I have to delete it, so I downloaded it again, I had to start from the beginning, I left it for a while, the same thing happened again, please fix.

This is a good game. I had downloaded before. I liked it then, and still do. I deleted it the last time because of the ads. The ads are a lot better this time. This is a fun game to play. I am enjoying it very much.