1.9.4 - Cannot delete selected video file

[cicciobello]

Open a directory in browser with videos. -> Don't play videos <-
Video file rename: no problem.
Video file delete: no problem.

But:

Double click to a video file -> open video in external player -> close player.

Rename this video: error to rename (but sometimes it works!).
Delete this video: video thumbnail disappear, but video file still here. Refresh browser: video file appear again.
Every now and then, however, deleting a video already seen in the external player works (!).

The external video player does not remain in memory, all autoplay disabled.

Win x64. Tested on NTFS and BRTFS, same problems.