Does the problem happen when using the Cash - Default or the Tournament - Default HUD?
If this issue is happening in replayer, do stats show up in the popup if you go to Options, and uncheck the "Hud Stat Values at Time of Hand" option? How about if you check the "Show Hero Lifetime Stats" option?
If you don't see any stats during live play, please reproduce the issue: play a few hands, then click on your HUD panel to open up a popup. Then go to File > Create Support Bundle, and save it. Open a
Support Ticket, with a link to this forum thread, and attach that Support Bundle, and we will investigate the problem.