Random redirect entries not working on multi-instanced DXP environment

[jkozak-c2]

Observed issues in Production DXP which is multi-instanced. Contacted Optimizely to enable multiple instances on PreProduction to test in that environment.

1. First tried a URL that I knew would not be in the redirects: https://SOMEDOMAIN.COM/adkdk

2025-09-19T01:17:00.7197572Z	dbug: Geta.NotFoundHandler.Core.RequestHandler[0]
2025-09-19T01:17:00.7197951Z	      Handling 404 request. Request URL: /adkdk Response status code: 404
2025-09-19T01:17:00.7220357Z	dbug: Geta.NotFoundHandler.Core.RequestHandler[0]
2025-09-19T01:17:00.7220551Z	      Not handled. Current URL is ignored or no redirect found. Request URL: /adkdk Response status code: 404

2. Tried a URL that is in the redirects and I know works:

2025-09-19T01:20:04.4443713Z	dbug: Geta.NotFoundHandler.Core.RequestHandler[0]
2025-09-19T01:20:04.4444308Z	      Handling 404 request. Request URL: /learn/project-management/online-time-tracking-software/ Response status code: 404
2025-09-19T01:20:04.4444635Z	dbug: Geta.NotFoundHandler.Core.RequestHandler[0]
2025-09-19T01:20:04.44447Z	      Handled saved URL Request URL: /learn/project-management/online-time-tracking-software/ Response status code: 404

3. Tried one that is in the redirect tool and is not working:

2025-09-19T01:20:34.8576606Z	dbug: Geta.NotFoundHandler.Core.RequestHandler[0]
2025-09-19T01:20:34.8577031Z	      Handling 404 request. Request URL: /wp-content/assets/downloads/pdf/legal/HIPAA-Security-Whitepaper.pdf Response status code: 404
2025-09-19T01:20:34.8579633Z	dbug: Geta.NotFoundHandler.Core.RequestHandler[0]
2025-09-19T01:20:34.8579828Z	      Not handled. Current URL is ignored or no redirect found. Request URL: /wp-content/assets/downloads/pdf/legal/HIPAA-Security-Whitepaper.pdf Response status code: 404

Here is the url in the not found handler:

[mickael-belloulou]

In a multi-instance environment, this approach is also not working for us.
We currently need to restart each instance one by one for new redirects to take effect across all instances.

Is there an existing job or mechanism that can synchronize or align the in-memory redirect lists across all instances without requiring restarts?