Contribution graph lost historical commits after username rename

[viktor-wilhelm]

🏷️ Discussion Type

Question

💬 Feature/Topic Area

Profile

Body

Hello,

I have a question about my GitHub contribution graph.

A couple of months ago I renamed my GitHub username and changed my primary email address to hello@viktor-wilhelm.de. My previous email address (wilhelm.viktor78@gmail.com) remained on my account as a verified secondary email.

A few days ago I temporarily removed that secondary email address because I thought I no longer needed it. After realizing it was still required, I added it back and verified it again on the same day.

I regularly check my contribution graph because I like to keep my daily contribution streak complete. I know for certain that my contribution history was displayed correctly before I removed the secondary email address.

Some time later, I noticed that many historical contributions had disappeared from my contribution graph.

However:

the commits still exist in the repository
the commits are on the default branch (main)
the repository is not a fork
both email addresses are now verified and linked to my GitHub account
the commit email matches one of my verified email addresses
the repository Contributors page correctly counts all commits
only the contribution graph is missing many historical contributions

For example, on April 29 there is a commit in the repository history, but the contribution graph shows "No contributions on April 29th."

This issue is not limited to a single day. A large number of historical contributions are missing across multiple months and multiple years. The April 29 example is just one example.

I already checked the official troubleshooting guide, but none of the listed causes seem to apply.

Since the Contributors page correctly counts these commits, it seems that only the contribution graph is affected.

Has anyone experienced something similar after removing and re-adding a verified email address?

Is there anything else I can check, or could this be a synchronization issue with the contribution graph?

Repository:
https://github.com/viktor-wilhelm/portfolio-app

Thank you!