Hello, I'm pretty sure this is a new problem with the most recent version.
I'm using a Powerspec 3D Pro (dual head), and have that selected.
In the earlier version, I just saw the build plate represented, with the model on it.
Now in 3.0.2, I see what looks like the Z-Arm. But the Arm looks weird. I switch to the FFCreator Pro, and the Z-Arm looks right.
When using the Powerspec, the model seems to be shifted forward.
I just reverted to the FFCreator Pro, and will give that a try.
But the Powerspec graphical arm needs to look like FFCrator Pro.
You might also want to look at your print offsets.