When using a rename script (the TitleCase style script is a good example, mine is a slightly altered one but attached for completeness), it is possible for the "(0%) Renaming - Directory Opus" dialog to come up and not actually do anything.
It seems to be whenever the preview has not finished populating - put the system under heavy load, click the Rename button, then click on the script based preset, followed by the Ok button before it gets a chance to properly update.
The Dialog opens with the buttons greyed out, and not responding to the window Close button. Even the folder is not locked by the frozen rename dialog as it is possible to delete it while that window hangs around
If you try to rename again immediately but wait for it to populate the preview then it works normally.
TitleCase.zip (2.22 KB)