PolyGerrit UI: https://chromium-review.googlesource.com/c/388905
Gerrit Native UI: https://chromium-review.googlesource.com/#/c/388905/

Second UI has a link (gerrit) to the commit in the left panel. This makes it easier to review documentation changes as they are rendered in Gerrit UI. Previously I've seen the gerrit link on PolyGerrit UI, so this is either a regression or it only works for some CLS.