I found a few weeks ago (sorry that I didn't open an issue sooner) that changing one's username will change one's avatar regarding the commit history. I've attached some screen-shots if that helps.
Within the 'after' picture one can see that the avatar to the left of the SHA1 is not the same as the avatar in the 'before' picture. I'm guessing that it may be a default avatar before codeberg generates one for each user. Reverting the username resolves this.
This isn't a major issue, but I feel that I should let everyone know.