MoonChild
That is a bug; moving towards the attacking character is just suppose to trigger if you attack him outside of combat range.
vhatever
Is this repeatable, if you have a save before this fight? If so, please email supportdos@larian.com, with a description of the problem (or link to this topic) and the report.zip file generated by the
D:OS support tool (for the PC version). The report will contain system and game information, as well as your saved games. To reduce the file size, you can delete all but one save from the zip.