Symptoms

When you promote standby Publishing agent to Master, former Master PA (SUP2-RAS01 in this example) and all other agents go to Not verified state while newly promoted Master PA (SUP2-RAS02) stays in Standby mode:

Cause

It's a known issue. Parallels Engineering team is aware of it and is working on the resolution.

Resolution

The fix will be available in the future product release. Meanwhile, please manually disable Standby mode for the secondary Publishing agent before its promotion.