Rogue Item Journals lines for stock takes

Our warehouse are performing perpetual stock takes most days and rogue Item Journal lines are appearing adjusting stock in NAV. Cross referencing each adjusted Item Journal line against Whse Entries shows a corresponding Whse Entry line except for the rogue Item Journal line which does not appear in any of the Whse Entries registered for that day.

This has happened a few times now and before I thought it was user error, but I don’t believe it is.

We are running NAV v5 (no SPs applied). Are their any known issues with NAV code in this area, or can anyone suggest a reason for this (apart from user error!)?

Thanks for any assistance received.