I have a blogger account and wished to use a custom domain address which I managed to buy and setup using Cloudflare. I enabled flexible SSL and used "always HTTPS" page rules. Now when i was setting up some templates for my blog, i noticed some errors.
On using custom domain name, certain gadgets or components on the blogger don't work. They simply vanish even if you have changed nothing on the template[ you just uploaded theme and simply use custom domain, you can see this issue]. What is quite frustrating is if you revert back to demo.blogspot.com, everything seems to work fine.
I tested to number of templates at least 6+ on different variation but this didn't seem to resolve.