Fix for backlog reporting when draining proxy (#2)

[maven-release-plugin] prepare for next development iteration

[release] prepare release for proxy-13.7

[release] prepare release for proxy-13.6

[release] prepare release for proxy-13.5

[release] prepare release for proxy-13.4

[release] prepare release for proxy-13.3

[release] prepare release for proxy-13.2

[release] prepare release for proxy-13.1

[release] prepare release for proxy-13.0