Hi
Just checked and you are correct, very strange
Pretty easy to sort out though (You will need some development skills to do this so pass on to your NAV partner if you not able to do yourself)
If you design on the 99000786 - "Production BOM" Page then open the properties for the second to last line '<RecordLinks>" you will see that the "Visible" property is set to FALSE
Just delete the FALSE word and move off the line and it will default to true again
This will get the links back
Cheers
Nev