wild bristle matrons not going into menagerie after capturing in map

when i first started farming beasts i could capture and take all of them out, but recently my wild bristle matrons that i capture in maps have not been getting sent to my menagerie. using two bestiary scarabs of the herd, and one bestiary scarab of duplicating per map. wild bristle matrons are the only beast it happens to, and i can't find a reason why. harvest beasts don't seem to be in the default menagerie cages, and i've cleared out my ursae cages fully to see if that was the problem, but i'm still not able to capture them.

EDIT: added clips and some explanation to go along with them

clips:

https://www.youtube.com/watch?v=S9fzmhX41fk

- you can see the matron on the left where my cursor is being captured, but when i check i only have the ilvl 70s that i bought previously.

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https://www.youtube.com/watch?v=w0hQY3gUNq4

- same thing with this clip, matron captured - doesn't appear in menagerie book, only the lower ilvl matrons that i bought.

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(the matrons i already have in my menagerie were ones i bought. i'm running t16s, so if i got the matrons they would be 83.)

i've had this happen at least 5 times now, and as mentioned before, every other beast works fine.