Hidden select box does not populate options after showing it based on another select box option. The issue does not occur in 17.1 GA.
Defect with Service Catalog 17.1 Rollup 1
Service Catalog 17.1 Rollup 1
This is a known defect with the application and there is a test fix available. Please submit a ticket with Support to get the fix.
To submit a ticket with Support, click here.