thank you for the replay
Here I need to add that I first observed the issue after I updated today to the new version from the store. The last version of ThingWorxView was not visible in store so I could not remember to had with the old version a poblem but... not really sure, because I wanted to test more detaled all features of the Windows Device Portal.
so... not sure ... may be it is could be such stupid mistake from my side.... will check tomorrow
I'm not sure if I understand your problem correctly, but I think I got the same issue, too. When capturing the images from HoloLens with the Device Portal and then starting ThingWorx View, nothing happens. The "scan your thingmark" isn't shown.
I think this is a HoloLens issue, because only one camera stream at the time is possible. So when streaming the images taken by HoloLens, ThingWorx View cannot access the camera and scan the Thingmark. This is why you should always start the observing stream of the Device Portal after the scanning of the thingmark is completed