I just added Yacht Devices ethernet gateway to an existing system to get AIS data to Expedition.  The AIS targets show on the map with all the correct information (tooltips, predictor lines, etc).  However the AIS window is completely blank--including no column headers.  When opening the window, sometimes I saw all the column headers very briefly, and then the window went blank again.  

I reached out to local Expedition experts, but they'd never seen this happen.  Any suggestions would be appreciated.