Take any random integration, e.g. http://coin/coin/integration/qt/qtbase/tasks/1570487946 and try clicking the links to Gerrit, they don't work, the sha1s are invalid.

Also in the links on Gerrit itself, from publisher/gerrit.go:

https://codereview.qt-project.org/c/qt/qtbase/+/276349 take the first integration failure, Tested changes (refs/builds/qtci/5.14/1570483008): all the links are broken, due to invalid sha1s.