It glitches in an iphone 8

Im getting confused because i have played this game for years and as soon as i buy a brand new iphone 8 it has some sort of weird glitches as if it hasnt been done downloading all the material in the game. Some items and skins for characters are just white. If not fixed ill just delete the game. Waste of time.

almightysosa133 about Heroes of Order & Chaos, v3.5.4