Steps To Reproduce:
(1) Open a directory containing 3 or more files.
(2) Select 2 or more files.
(3) Drag&drop the files to another directory in the left pane (directory tree view).

(Note: you can also move files to a sub directory under the source directory shown in the right pane, but in this case you need to do it quickly so that it will not navigate into it while dragging.)

Expected Result:
Files are moved.
File selection in the source directory is cleared.

Actual Result:
Files are moved.
One of the files (right after selected ones) in the source directory is newly selected.
It stays in the check-select mode.

How frequently does this problem reproduce? (Always, sometimes, hard to
reproduce?)
Always


This is similar to  Issue 742689 . The difference is that deletion can be done by keyboard shortcut as well, whereas drag-and-drop is always done by pointer (mouse, touch, stylus).
So user is less likely to care about the keyboard focus after drag&drop.