Status:
Investigating
Model - Field properties not showing when added a Direct Query Table and saving the file/reopening
Action: - A have a model with imported tables - I added a direct query Table - I still could change the field properties in the model for all tables - I saved the file and closed it - I reopened...
The bug still exists in version 2.120.963.0 64-bit (August, 2023). I was not getting results with the above mentioned workarounds so I was trying various things, and I'm not 100% sure what did it, but refreshing all the stale previews ("Preview was last refreshed more than x days ago...") in the Power Query Editor is the last thing I tried before I noticed it was working again.
It's been over a year since the last update on this issue - please give it some attention, v-cazheng-msft.