I was working with AdMob almost 8 years until Adsense terminated my account for invalid activity. there was no explanation of the reason. I've sent one appeal and after almost 1 month of silence the second, and both were rejected. I had not clicked on ads, and 7 years all was OK! No signs of trouble.
I want to believe that it was not a deliberate sanction for content that the company dislikes for other reasons.
The worst technical support of Adsense does not allow talking with any living human, only robots and links to common questions are presented.
I think Google became as Frankenstein, plays too much with machine learning and robots made them unstable and unreliable.