PowerChart tag browser start path doesn't load initially

On the PowerChart, the filter path for the tag browser doesn’t seem to load the filter on inital page load, the format is valid because if I click the refresh button it will filter correctly, it just seems like an unnecessary step. The filter is configured with a script binding that only takes 2ms to process so I don’t think that’s the problem.
Before Refresh:

After Refresh:

We’ve got the same problem on 8.1.3.
Any update on this problem ? any workaround ?