Thulecite Club Shadow Tentacles only attacking once

I was aware of this, but I assumed it was intentional to curb the otherwise-rampant bonus DPS of the tentacles. Even one pair of tentacle swipes per 5 strikes raises effective damage per hit of the club from 59.5 to 73.1, higher than the morning star on wet targets. Three pairs of swipes would raise them above blow darts.

Walter's Cursed Rounds summon tentacles every other hit, instead of every 5 hits, raising their effective damage per hit from 51 to 85. Multiple pairs of swipes would raise this damage much faster than it would raise the thulecite club's, since they summon tentacles much more frequently; a single extra pair of swipes would raise it to 119.

I'm not sure if this was addressed in the recent Thulecite Club buff but when I test it on a dummytarget it appears that the tentacles do indeed hit twice before despawning.