Hanging container with 2 simple listbox

[#1]

Hello,

I built a simple time dimension, and I want to use a container to choose between 2 listbox "Year" & "Month".

If you keep switching between tabs, there will one time where the the container becomes not accessible (it is hanging as shown on the following picture)

I have not much data in this Qlikview file, and this scenario appear after 5 to 10 clicks (either using the desktop version QV10-SR2, or the server version trought IE plugin)

Have you experience such scenario? What is the reason? I have only 36 records?