I have a project with a build step with an AND condition. The first is a BOOLEAN condition on an environment variable "TriggerGame". The second is a STRING condition on another environment variable "CONFIGURATION".

In the same project, I also have a post-build step (using Flexible Publish Plugin) with a STRING condition on the environment variable "CONFIGURATION".

The output of the build step (using conditional-buildstep) is not sufficient to follow the result of the evaluation:
>> Run condition [And] enabling prebuild for step [BuilderChain]
>> Run condition [Strings match] enabling prebuild for step [Archive the artifacts]

In the output of the post-build step (Flexible Publish) is easier to follow:
>> Strings match run condition: string 1=[Release], string 2=[Release]
>> Run condition [Strings match] enabling perform for step [Archive the artifacts]

Can you modify your output for STRING condition to be like Flexible Publish ?
Can you add an output for BOOLEAN condition ? Like "Boolean condition: ${ENV,var="TriggerGame"} evaluate to false"