E5570 input freezes while on docking station

I have a Latitude E5570 laptop that was purchased in November 2016. I have been using it with an E-Port that was purchased perhaps 5 years ago with my previous laptop. The combination has been working fine until the last week or so. Several times a day, the input will freeze. Neither mouse nor keyboard respond to input. This includes the keyboard and touchpad on the laptop. If I undock the laptop and allow it to reset, then redock, everything works again. At first I thought this might be a dock hardware issue. However, after looking through the forums, I am wondering if this might be a driver issue.

Has anyone else experienced this issue?

Thanks,

Edward.