This is possibly due to issues with cache busting in the /chart URLs not being very robust. I can see if I can improve that.
You could view your browser's Developer Tools, switch to the Network tab, and watch the chart requests, to see if they seem to match the intended refresh cycle.
OK, but exercising possibly complex real-world sitemaps is very important. I have a very similar set of chart period buttons and different
visibility= parameters in my sitemap, and it worked properly here, but if you have any chance of a problem, let's find it!
Thanks for your help testing.