File list not refreshing

[Beemer2]

For many past revisions, including 6.73RC2 build 4280, after deleting a file directly from the Newsbin file list, several contiguous lines of files are completely blank. Refreshing the screen does not change anything. If I mouse click on any they individually appear.

I use Windows 10 64bit, 16gb memory, Graphic card is Nvidea GTX 1060, Display is Spyder calibrated HP LP2475w .

Ian