Executing copy artifacts against a specific build number. In this case, the project is trunk_analyzers_merge-modules and the build number is 50. The build fails as follows:
Copied 2 artifacts from "trunk_database-clone" build number 48
Unable to find a build for artifact copy from: trunk_analyzers_merge-modules

This persists until the trunk_analyzers_merge-modules project page is viewed, at which point the next build will be successful:
Copied 2 artifacts from "trunk_database-clone" build number 48
Copied 5 artifacts from "trunk_analyzers_merge-modules" build number 50

The same build will fail again the following day. This is happening with many jobss.

No obvious errors in the Jenkins logs.