Crosstab Conditional Style Will Not Apply Using Variable

[benjamin.malmquist]

I have a crosstab query with two row groups that were initially created using the crosstab wizard.  The variables are {STUDY_SITE} and {STAFF_NAME}.  I needed to list the home location of each {STAFF_NAME}, so manually added a third row group with the variable {INSTITUTION}. 

The report works perfectly, but I am now trying to apply a conditional style using the {INSTITUTION} variable as a condition.  Unfortunately, this doesn't appear to be possible.  I can apply a conditional style using {STUDY_SITE} and {STAFF_NAME} just fine.  When I preview the report using {INSTITUTION} as a condition, the report runs fine and with no errors, but the styling is not applied.

Has anyone else encountered this problem or found a solution?