I am not sure where to report this, and it is probably trivial for the VLC team to fix this.
When "loop one" is activated (which I leave activated most of the time), trying to open a file which for any reason cannot be opened (file deleted in between, network drive ceases to be available, file corrupted, etc), VLC goes into an infinite loop of attempting to re-open the file. This makes VLC unresponsive, and the only solution then seems to be to kill the process, which is sometimes challenging if the VLC windows is brought forward on each attempt to open the file, sending the Task Manager back to the background within milliseconds.
Happens on Win 7 + Win 10.
There should be some logic that if the file failed to open and "loop one/all" is activated, there shouldn't be more than n attempts made over a period of time.