Enterprise Search Connector Validation Issue

My ServiceNow Enterprise Search connector (AG_moveworks_kb, OAuth 2.0) is stuck on validation. All four checks — Credentials, Content, User, and Permission — spin indefinitely with no error or timeout.

What I've tried
- Re-Validated multiple times
- Confirmed ServiceNow instance is accessible
- Tried across multiple browser sessions

Questions:
1. Is there a known cause for validation hanging indefinitely?
2. Is there a way to force-reset the connector state?
3. Any backend diagnostic tools available?

Attaching screenshots. Any help appreciated!

Thanks