Filigree set bonus bug with Spark of Logic

[Carpone]

I have 2pc Through the Mists slotted, but the set bonus does not appear on the weapon. While killing the displacer beast rare in Saltmarsh wilderness, I was not benefitting from the 2pc bonus (True Seeing).

https://cdn.discordapp.com/attachments/540228566395125760/876448645552164914/dagger_set_bonuses.PNG
https://cdn.discordapp.com/attachments/540228566395125760/876448585657495583/dagger-filigree.PNG

For completeness, here's the artifact info. Note that 2pc Through the Mists does appear on the artifact.

https://cdn.discordapp.com/attachments/540228566395125760/876448630435876884/artifact_set_bonuses.PNG
https://cdn.discordapp.com/attachments/540228566395125760/876448594868203540/artifact_filigree.PNG