I have not tried to reproduce these bugs.
I hired two employees then fired the first one. When I hired a new employee, that employee did not have access to the the welcome training. This new employee sat in the same spot as the very first employee I hired.
Another bug I noticed was that I could only see the graphics for the screen of that new employee. The rest of the monitor was not there. It appeared once a computer upgrade was done (from stage one computers to stage two computers)
Best of luck!