Is this a bug, and if it is not, how do I fix it?

does anyone know why the simucube ‘actual maximum torque’ number does not change when I adjust the strength either up or down? I can only recall a handful of times where it has populated. Most of the time it is 0. Is this a bug?

Most likely True Drive has downloaded data from the device, before the device has asked the servo drive about the actual maximum current available on that servo drive model.

It should work OK if you close and restart True Drive.

Also, the data will be saved if you press the save button on the hardware settings tab at least once, or set a default profile at least once. Afterwards, the data will be available for True Drive also before device has asked the information from the servo drive.