This question already has an answer here:
When you visit your user page at
HTTPS, secure connection), the links (e.g., top questions and answers) take you to the HTTP (not HTTPS!) locations.
My experience with other sites created an expectation that once I land in a secure area, I only leave it by an explicit request and with a warning, so the current behavior looks like a bug to me.
It appears that I am not the first to notice this shortcoming. Other sites appear to make faster progress on this. SE is the premier technology site on the internet, and it seems to be struggling with a technical issue for years. Isn't this weird?