It seems related to an issue with graphic card and rendering in WebGL.
I have some questions :
1) What is the graphic card available on the workstation ?
2) What is the CPU used ?
3) Do you have an embedded GPU in CPU ? (for example in Intel core 7, an Intel HD graphic GPU is embedded and can be used instead graphic card on pci-express port)
4) Did you upgrade to last drivers for graphic card and for GPU embedded ?
Thanks in advance for your feedback.