Thank you for the detailed explanation 
I didn’t wait that long, I try again …
For this reason, some time ago, I had removed the responsive option for adsense mobile banners (which is the default setting of the adsense plugin), at this point I believe it is caused by this banner moving all the time: Cookie compliance under GDPR - #43 by ljpp
I should disable the google gdpr banner and find another alternative…
Thanks again for the tips.