WAF Authentication Forms shows 404 after upgrade to SFOS 19.5.3 MR-3-Build652

After upgrade - all WAF with authentication form with template shows 404.

Opening and saving Protection Policy - does not solve the issue.

Recreation of Authentication Policy - does not solve the issue.

Reimporting form template - does not solve the issue.

reverseproxy.log - not showing any errors, except 404 reason.

Any manipulation with one WAF rule - ALL 59!!! rules are restarted. User Portal is showing to users, instead of web servers.

Searched, that this issue must be resolved in 19.5.3 MR-3, but it is still making huge problems

XGS3300 HA-cluster, Active-Passive

Added TAGs
[edited by: Erick Jan at 9:57 AM (GMT -7) on 30 Aug 2023]