Using Whirling Slash on a Whirlwind lance projectile area causings issues

There are times when I use whirling slash around an area that has a whirlwind from Whirlwind lance. The whirlwind from the slash then seems to gain the stages, but bugs when trying to use twister with that whirlwind from whirlwind slash. The whirlwind is consumed but no twisters are produced at all.

On further use, it might also be that the twisters do exist but might invisible so hard to determine. There seems like times the enemies take a lot of damage from "nothing". So able to reproduce quite often when using the whirlwind slash around the area of the whirlwind lance.