OnAudioFilterRead and Unity Ads hate each other

Hello everyone,
after several months working with Unity Support on a crash my game is encountering, I finally found the issue.

Simply using OnAudioFilterRead anywhere in the game, even in a inactive Game Object, and using UnityAds makes the game crash after 2-7 ads. The only workaround I found is development build.

I'm seriously thinking of releasing the game in development build.

Has anybody else encountered this glitch ?

(Joined two very simple scripts. Just enable ads and compile scene.unity (be careful, the sound is bad) and see the beauty of the crash.)