Expanded list of contributors shakes uncontrollably

[mxdvl]

When expanded on hover, placing the pointer in the blank space between two icons makes the list enter a infinite shake between expanding and shrinking. Best explained visually:

https://user-images.githubusercontent.com/76776/222196506-d46be5bc-d0cb-428d-9fa5-a5703b673ab5.mov

Browser: Firefox on macOS