Builds are displayed multiple times instead of once, when multiple builds are triggering the same downstream build with help of the quietPeriod option (see https://www.jenkins.io/doc/pipeline/steps/pipeline-build-step/). This is probably a rare case, but happens in our setup quite often. The relationship between jobs is n:m instead of 1:n.

The builds foo and bar are both triggering by the same Autoexec build #35026. The graph should display Autoexec #35026 only once instead of twice (see the attached picture)