Love Nikki and Shining Nikki pop up window

These two games have a pop up window that happens every time another app is opened or used while the game is open.

The in-game support is blaming the pop up window on the current iOS version. The pop up doesn’t occur in other apps, only Love Nikki and Shining Nikki. The “app support” shown in the app’s info of the store doesn’t work.

Pop up window: “Love Nikki” would like to paste from “Facebook” / Do you want to allow this? / Don’t allow paste / Allow paste

The pop up is the same no matter what app is used while the game is open.

Has anyone figured out how to fix this annoying pop up window?