Problem with InventUpdate class, updateDimReservePhysical method. in AX4

I'm not sure if this is a bug or not (coz the code remains the same from AX4 to AX 2012)

The thing is when I want to register a journal, at some point, updateDimReservePhysical is called, and this code is there. The code in red is where I have the problem.

 if (_inventRefTransId)
            {
                select forceplaceholders forupdate inventTransIssue
                    index hint TransIdIdx
                    where inventTransIssue.ItemId              == movement.itemId()                   &&
                          inventTransIssue.ValueOpen           == InventTransOpen::Yes                &&
                          inventTransIssue.StatusReceipt       == StatusReceipt::None                 &&
                          inventTransIssue.StatusIssue         == StatusIssue::ReservOrdered          &&
                          inventTransIssue.InventTransId       == _inventRefTransId                   &&
                          inventTransIssue.InventRefTransId    == movement.transId()
                #inventDimExistsJoin(inventTransIssue.InventDimId,inventDim,inventDimCriteria,inventDimParm);
            }
            else
            {
                select forceplaceholders forupdate inventTransIssue
                    order by DateStatus
                    where inventTransIssue.ItemId              == movement.itemId()                   &&
                          inventTransIssue.ValueOpen           == InventTransOpen::Yes                &&
                          inventTransIssue.StatusReceipt       == StatusReceipt::None                 &&
                          inventTransIssue.StatusIssue         == StatusIssue::ReservOrdered          &&
                          //I have changed !=  for ==
                          inventTransIssue.InventTransId       == movement.transId()                  &&
                          //inventTransIssue.InventTransId       != movement.transId()                  &&
                          inventTransIssue.InventRefTransId    == ''
                #inventDimExistsJoin(inventTransIssue.InventDimId,inventDim,inventDimCriteria,inventDimParm);
            }

If I leave != I get an error. Debugging, I see that InventtransIssue gets mapped to a JournalTrans of type Sales. However, my actual Journal is Transfer type, so this makes no sense for me. Why would the code just search for a random transaction that has nothing to do with my Journal??

Changing it from != to == the error was solved, but I don't know if this may cause problems in any other proccess.

Any thoughts??

Thanks!