I'm not sure which IDE you are referring to. If you are now using the Silabs IDE are you single stepping the program? If not, the IDE will not update any debug windows you have open. In order to observe any register the CPU must be halted, then a boundary scan is initiated and all debug windows are updated. This is extremely fast and the updates is the actual data from the CPU. Use breakpoints to quickly go around repetitive loops and areas you don't need to see. Then using the run button (green)to start the program and it will stop at the breakpoint. Then just use the Step Into icon and single step the program until you come to your area of interest.
If you would describe the steps you are using while trying to debug possibly one of us might be able to help figure out how to get the data presented.

Hal