Also experiencing this issue here. The effects in standalone are minimized but still noticeable. The majority of fixes here were mostly ineffective for me.
It is worth noting that the same enhanced input action works very well on gamepad. It’s kinda like it’s not registering input for the mouse when its moving slowly. Sort of like a weird dead-zone. I even tried adding a dead-zone modifier to the input, thinking it may have been using some arbitrary lower cutoff value by default. But no luck.
Hoping we can get a little love from Epic on this one.