I have a dashboard that uses a series of parameters as dropdowns (because the report has several data sources). Out of four parameters, three work perfectly fine. The fourth also works fine...but only for the first few selections. This dropdown (Department) has about 100 selections, and after toggling between 3 or 4 choices, the dropdown freezes. It doesn't allow you to select another department, nor does it hide the window. It essentially blocks the viz and forces you to exit and reload the workbook.
Note that this ONLY happens in Tableau server. It works fine on my desktop. We are running 9.1 on Desktop and I believe 9.x Server.