I noticed on two systems I managed the same issue since they both went to Truenas Scale 25.10.
From time to time, while I navigate into a dataset, Windows 10 “lost” the connection to the dataset, so I just get an error message on an empty window. I can “see” it but it shows just an empty file.
Then, if I go & come back from this dataset to other disks or virtual disks, at some point I see again the content of my dataset.
It seems more focused on some datasets, but I cannot see any pattern, all the datasets I can access from Windows 10 have the same rights and attributes.