Setup:

Simple Build Pipeline "Build A -> Build B"

Build A:
Build: Shell execution 'echo "Hello"'
Post Build Action:
Build other projects (manual step): "Build B"

Build B:
Build: Shell execution 'echo "World"'

Problem / Steps to reproduce

1. Pressing "Run" in Build Pipeline View triggers "Build A"
2. Build A goes green >
3. Trigger "Build B" in Build Pipeline View
4. Build B runs and and finishes with succes
5. Build B does not get green in the Pipeline
6. Build B has no connection to the upstream job

Additional information

• The problem did not occur in Jenkins versions 1.642.2, 1.642.3 and also not in 1.652
• In the working versions we can see the following env variables:

  BUILD_CAUSE	MANUALTRIGGER,UPSTREAMTRIGGER
  BUILD_CAUSE_MANUALTRIGGER	true
  BUILD_CAUSE_UPSTREAMTRIGGER	true
  

• In the new version the env variables only state the following:

  BUILD_CAUSE	MANUALTRIGGER
  BUILD_CAUSE_MANUALTRIGGER	true
  

• When Build B tries to copy an artifact from upstream build, it fails
• The information "Started by upstream project "Build A" build number x" is missing in the console output of Build B