Update Aug 2020 by @matthieu - we have heard back from Google Maldvertising team and they have said they have “fixed some issues” on their end, and it seems the issue is FIXED.
if you still experience this issue from August 2020, please leave a reply here!
"Your site has been blocked for violation of our “Malicious or unwanted software” policy, as our most recent scans have found malicious programs and strings on your site. In order to guarantee the safety of users, the publication of resources with content potentially harmful to its customers is not permitted.
For your convenience I send you the following list of malware detected by our systems, I invite you to analyze it together with your webmaster so as to be able to proceed with their removal independently: