After restarting the SpectroServer, and not the OneClick server integrated with CA Performance Management, no events are seen from the CA Performance Management integration.
Checking the OneClick administration page for the CA Performance Mangement, polling is still enabled.
CA Performance Management
Spectrum 10.3.1 or earlier
This issue is resolved starting with Spectrum 10.3.2
As a workaround, set polling to off in the OneClick CA Performance Mangement Integration configuration page and click save, then set it enabled and click save.