Larian Studios Forums Baldur's Gate III Baldur's Gate III - Technical & Gameplay Problems Two Weapon Fighting Using Action and Bonus Action

It's most definitely a bug.

I notice it a lot of times when shooting [Main Attack] + [Off-Hand Attack] with a single mouse click, but the [Off-Hand Attack] does not display in the combat log. No miss, no hit. Just unregistered completely.

It is a similar issue with the Gnolls trying to get to Rugan. If anyone here has noticed, when they use [Seething Fury] their next attack will not register.

So I'm sure these bugs will be fixed eventually, because these are definitely unregistered hits by the system.

WORKAROUND: Press "R" to toggle single-hit attacks and use Off-Hand attack manually.