I randomly started getting this in my project right around the time you made this post which was odd.
Do you have Metamask installed as a browser extension? I disabled the extension and the warnings went away.
I found this post: https://github.com/MetaMask/eth-phishing-detect/issues/11900
Which potentially suggests that something in our projects are triggering metamasks anti-phishing feature somehow? Not quite sure, but disabling the extension removed the warnings and confirmed it wasn’t something in my app directly.