acme: Let's Encrypt certificates stuck in PENDING after upgrade from 1.16 to 1.19.2 (EE-Latest)

### Describe the Bug Hi, I recently upgraded our Pangolin deployment from version 1.16 to the current 1.19.2. As part of this upgrade process, I performed the following steps: 1. Upgraded all corresponding dependencies (gerbil, trafik, and bager). 2. Switched the image tag from community to ee-latest. 3. Generated and configured a valid license key for enterprise operation. The core application starts up, but I am now facing an issue with ACME certificate generation. Let's Encrypt certificates are no longer being issued successfully; the challenge status remains stuck at PENDING indefinitely. Prior to the upgrade, certificate generation worked flawlessly. I suspect there might be a configuration change between 1.16 and 1.19.2 or an issue related to how traffic is routed to the validation endpoint after the upgrade. Note: Existing Let's Encrypt certificates that were created under version 1.16 (or earlier) are still working fine and remain valid. The issue only affects new certificates or renewals. Log (anonymized): --- look my next post --- Any idea? ### Environment - OS Type & Version: Debian Trixie, acutal - Pangolin Version: 1.19.2 - Edition (Community or Enterprise): Enterprise - Gerbil Version: 1.4.2 - Traefik Version: 3.7.5 - Newt Version: 1.13.0 - Client Version: ### To Reproduce ? ### Expected Behavior ?