I first noticed this with version 1.0.7. The master job in Matrix job is able to sync just fine, but the slave(s) that are triggered sync and fail with the following error:

21:32:55 Unable to update workspace: com.perforce.p4java.exception.ConnectionException: For input string: "3605760456"

Here's the full log from the Job triggered by the master:

21:32:09 [EnvInject] - Loading node environment variables.
21:32:09 Building remotely on rsmsnbuild114 in workspace c:\trees
21:32:15 SCM Task: cleanup workspace: RSMSNBUILD114
21:32:15 SCM Task: syncing files at change: 959450
21:32:15 ... sync c:\trees/...@959450
21:32:15 ... force update false
21:32:15 ... bypass have false
21:32:55 Unable to update workspace: com.perforce.p4java.exception.ConnectionException: For input string: "3605760456"

Here's the log from the Master job:

21:20:11 [EnvInject] - Loading node environment variables.
21:20:11 Building remotely on rsmsnbuild117 in workspace c:\trees
21:20:19 SCM Task: cleanup workspace: RSMSNBUILD117
21:20:19 SCM Task: syncing files at change: 959403
21:20:19 ... sync c:\trees/...@959403
21:20:19 ... force update false
21:20:19 ... bypass have false
21:32:09 Triggering rsmsnbuild114
21:35:18 Finished: FAILURE

The job has P4 configured like so:
Workspace: Static
Character set: None
Workspace Name: ${NODE_NAME}
Populate Options: Sync Only, populate have list, pin to label unchecked
Polling Filters: None
Repo Browser: Auto