Can you please check if you are using the latest version. I just tested it on my side and it seems to be working fine. Checking and unchecking stats in your report header then clicking “apply “should add/remove the stat in your report. Can you please send us a message through the DH2 app with logs attached so we can check this for you.
Edit: I just checked this on other PCs and it looks like this issue happens on some systems, i informed our developers about this. thanks for letting us know and please wait for our update.