Wrong author in activity log but correct one in commit - still relevant

Since a picture shows more than 1,000 words.

Wrong user in activity log:

activity_2015-10-15_10-41-24

correct user when clicking on the commit hash:

<span data-escaped-char>_</span>JSEvola___GitLab_2015-10-15_10-43-10

The user who does there pushes has his Github config set to the mail adress he is registered with in Gitlab. Up until yesterday his commits showed up for the correct user (RX) then it suddenly changed.

How can I fix this error?

this is the same issue that wasn't fixed but was closed for an unknown reason.

please fix it