From July 1st to July 4th, 2020, Google has experienced an issue where a small number of promotional emails and spam were incorrectly delivered to users’ primary inboxes. During that time, scans to filter malware and the most egregious spam and harmful content worked normally. Other features such as link protections and download time security scans were also not affected. If you notice a suspicious email, we encourage you to mark it as spam in Gmail.
We apologize for the inconvenience this may have caused.
-Computing and Communications Services