Data Action deployment fails with 422 in AU-1 BYOC

I can’t seem to figure out why the custom data action fails during CLI deployment in AU-1 BYOC. The payload validates locally, but the API rejects it during the push phase.

Verified JSON schema against GC documentation. Error returns 422 Unprocessable Entity. Field: expression. Message: “Invalid syntax at position 12”. Using genesyscloud-cli version 2.4.1. Environment is AU-1 BYOC. Terraform state is clean. No drift detected. The same payload works in US-1 region. Suspect regional difference in parser or API version. Checked recent release notes. No breaking changes listed for data actions. Need to know if AU-1 has stricter validation rules. Or if there is a known bug with specific expression types. Attaching the minimal reproducible HCL block and the raw API response below. Thanks for any insight.