The release of Varnish Enterprise version 6.0.13r11 has been removed from the package repository. This is due to a regression in the latest release.
The issue that has been uncovered can lead to backend TLS backend traffic hanging, causing timeouts and delays in serving traffic. This can severely affect the Varnish Enterprise server throughput.
We do not recommend anyone to use the 6.0.13r11 version at this time. Users that have installed this version may want to downgrade to version 6.0.13r10 if they are experiencing issues.