missing coverage when running karma with multiple different configs

[joseph-jja]

I have 3 different configs in a project: 1) common code; 2) site a; 3) site b. When I run grunt karma:siteACoverage or grunt karma:siteBCoverage or grunt karma:commonCoverage a coverage report is generated for the correct site. When I run grunt karma it only generates a coverage report for common and then the other 2 reports are empty? I am not sure where to debug this or how?