If a non-draft change (a) is converted to a draft change by a new commit (a') and then moved to a non-draft (in gerrit ui) then

1) Jenkins will trigger a build for a'
and
2) if the build for a' is in progress when the change is made to a non-draft (identical git hash) then the build for a' will be aborted and a new build will be triggered.

Both of these waste CPU & IO cycles.

Gerrit 2.8
Gerrit-trigger 2.11.0
Jenkins 1.532.1