I did some extensive testing with all my builds that use spam skills and was able to repro this bug for these skills:
- Chain Lightning
- Beronath’s Fury
- Primal Strike
- Righteous Fervor
- Touch of Chaos
- Phantasmal Blades
- Devouring Swarm
- Fleshwarped Strikes
- Callidor’s Tempest
- Stun Jacks
I think these have it too but I’m not 100% sure, if there’s a difference it seems to be very minimal (I think this needs further testing, different builds might give different results):
I didn’t notice any difference at all on channeled skills like Acid Purge, Drain Essence and AAR.
Those are all the skills I’ve tested and with the few exceptions that I mentioned the difference between mouse and keyboard binding was quite noticable. I tried both with and without Grim Internals, it doesn’t matter.
Chain Lightning and Stormfire are weird though. I tested several chars that use these two skills. Some have this bug, some don’t (or it is extremely minimal). At first I thought different cast speed values of these builds makes the difference but it doesn’t seem to correlate, neither does the gender of the character.
The mouse I’m currently using is an old Logitech RX250, keyboard is new but some cheap noname brand, both plugged to USB ports. Using Windows 10, I tried tweaking all the available mouse settings but it didn’t have any impact whatsoever.
Very weird bug indeed, I hope this can be fixed.