My game always crash

I play csr 2 racing for last update 3 days a go i play the game but the game always close again n again . I contact support for the game still not have answer .i can’t do race anymore because game always close when i’m in the game. i’m used ios 12.4.4 the game support with iphone 6 plus this problem when the game update n size more bigger. I think that’s not a problem because i have more space more than 25 GB but game keep crashing .hope i get answer for this problem .my phone or game apps not proper i’m used iphone 6 plus 64 GB