Game crashes when taking screenshot after admob ad has loaded on Android

I recently finished integrating admob using the admob plugin with a prefab. The plugin works fine and the ads load correctly, but whenever I try to take a screenshot of the game, either with the home / lock button combo, or with the palm swipe, the game crashes.

Also, as a side note, the game uses OnApplicationPause() to set the timeScale to 0 to pause the game, would this have any effect on it?

Does anyone know what could cause this to happen?