Just found out that when doing web search with my \<private project name>, among the top search results were the schematics of the project from EasyEDA. So not so private at all! How this is possible? I was using different computer than usually and was not logged into my accounts (on google or EasyEDA or anything else).
Chrome
91.0.4472.101
Windows
10
EasyEDA
6.4.19.5