Using the GitVersion task from VSTS Marketplace, it's working fine updating assembly info and nuget version, but when I want to use any GitVersion variable to tag or label my sources, the variable is not expanded.

and so here is the result in the log file

If I use a user-defined variable in the build process, i.e. $(tagVersion) and assigning a value (1.2.3.4) then the tag is correctly labeled with the variable's value.