diff --git a/docs/configuration/index.md b/docs/configuration/index.md
index c6dcbfd397..b6c3fe578e 100644
--- a/docs/configuration/index.md
+++ b/docs/configuration/index.md
@@ -844,6 +844,14 @@ Additionally, the target branch of the pull request must match the branch specif
 the configuration for that job. For more details on setting up such a job, refer to
 [this documentation](/docs/configuration/upstream/copr_build.md).
 
+:::caution Multiple OSH jobs
+
+If `osh_diff_scan_after_copr_build` is enabled and you have multiple Copr build jobs with the `pull_request` trigger, each will trigger its own OSH differential scan.
+To ensure each scan compares against the right base build, assign matching `identifier` values to each `pull_request`-triggered job and its corresponding `commit`-triggered job.
+If identifiers are missing or don't match, Packit falls back to the first `commit`-triggered job configured for that branch — which can mean multiple scans end up comparing against the same (possibly wrong) base build.
+
+:::
+
 :::info
 This functionality is an initial prototype and both configuration and functionality
 will likely change in the future.
diff --git a/docs/configuration/upstream/copr_build.md b/docs/configuration/upstream/copr_build.md
index d8f6042a86..0378a53454 100644
--- a/docs/configuration/upstream/copr_build.md
+++ b/docs/configuration/upstream/copr_build.md
@@ -65,6 +65,7 @@ With this configuration, you'll get builds in all stable fedora releases
 * **identifier** - Suffix added to the name of a GitHub check run. 
   For example if you [set this to "mock"](https://github.com/rpm-software-management/mock/pull/902/checks?check_run_id=6530714905), then a check run for Rawhide would be
   named "rpm-build:fedora-rawhide-x86\_64:mock".
+  Additionally, this option has uses in relation to [Testing Farm](/docs/configuration/upstream/tests#optional-parameters) and [OpenScanHub](/docs/configuration#osh_diff_scan_after_copr_build) jobs.
 :::caution
 Make sure to configure this option if you are having multiple `copr_build` jobs in the configuration,
 otherwise the reporting may be incorrect.