We have made some changes in the plugin to have it working with GA universal sending theme name as a custom dimension. It is running fine on our dev installation but it is not working on the production site. The only difference between both installations is the host.
Dev site is on our dedicated server without any caching plugin whereas the production site is on wpengine enterprise plan with page caching.
It is not lettign the cookie work properly so theme gets switched randomly on each page refresh.
Would appreciate your help.