PC or Android?
PC - If you been using the update patches for awhile I would try a clean install. While you don't technically have to for PC be safe, back up your saves "game\saves", install fresh, restore saves, and play. Even if you didn't a clean refresh might help especially for those who are used to just updating the "game" folder.
Alternatively try changing the render to Angle2 (DirectX)
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Android - Not that familiar but backup saves and reinstall.
" Android/data/com.domain.corruptedkingdoms/files/game/ "
Newer versions of Android might make this more difficult however a better file explorer or connecting it to pc might work.