First thing to check is that the version of the add-on you’re using is the newest; if you update through an add-on manager site, then that’s dealt with.
Have you set Custom iL thresholds and if so, is the item in question outside the upper limit? If you’re using the default ones, then nothing in game is currently over iL1000, so that won’t be it.
The only thing that may not be acknowledged by BiB is that you’ve set all your latest gear to each of the spec’s the character in question has Artifact Weapons for, so as is mentioned often try this:
*With the in-game tool open, equip the full set of gear you have for every Artifact Weapon you own, even if you don’t play that spec’n.
*Open all you Bank/Void Storage options for a few seconds each to allow all possible gear to be seen.
*Shift-Click ALL Artifacts you own so that if you have any new Relics, they can be assigned, if necessary.
Once you’ve done that, only THEN export the data string to the website to run BiB… if this doesn’t resolve the gear assignment issue, the unfortunately I’m out of answers & Yellowfive, Swol, et al are the ones to take over.
Good luck & hope this helps.