Great question — answering as the UphillTech team:
After digging into this, I wanted to report back with some ideas that seem promising: Make sure you've set up Google Search Console at both the old domain and the new domain. This gives you a clearer picture into what Google sees for both domains, and allows you to... ...use the Change of Address tool . This explicitly tells google that your site is moving, instead of just relying on redirects. Check for "Manual Actions" in Google Search Console > Security and Manual Actions > Manual Actions . See more details about manual actions here . Look for "Security Issues" reported in Google Search Console > Security and Manual Actions > Security Issues . I found a security issue posted on my old...
Full answer by bryanbraun: https://webmasters.stackexchange.com/a/145283 (CC BY-SA 4.0).
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