I'm not sure if it should be the Jenkins Core, but I couldn't see any plugins which related to this.

The issue is that for builds which are started by upstream project the link "Started by an SCM change" points to a non-existant location (http://build/pollingLog), where build is the name of our server.

See the build.png, the link circled in red.

The Upstreamjob.png attachment shows the definition of the upstream job