I'm afraid that in order to help you , I would need a reprex. As I'm unable to recreate your issue without it. FAQ: How to do a minimal reproducible example ( reprex ) for beginners Guides & FAQs A minimal reproducible example consists of the following items: A minimal dataset, necessary to reproduce the issue The minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and including the necessary information on the used packages. Let's quickly go over each one of these with examples: Minimal Dataset (Sample Data) You need to provide a data frame that is small enough to be (reasonably) pasted on a post, but big enough to reproduce your issue. Let's say, as an example, that you are working with the iris data frame head(iris) #> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.2…

I took the code and initial data that you originally provided, and satisfied myself that there is nothing inherintly wrong with your apprpoach, it works after all. I suppose the devil is in the details which I can't access as of yet.

Here is that test shiny app I created. The top plot is unfiltered, the bottom one is filtered on State code (iso..)