[GAMEPLAY] Luden's Echo not working with Katarina's W( sinister steel)

I noticed that Ludens Echo says that whenever it reaches 100 stacks the spell will create an 'echo' of damage. When i played as Katarina i got ludens, played on it, and noticed that when i had about 90 stacks on it, and pressed w, it would not activate the extra damage, i figured this was just how it was ment to be. To test it I did the same thing with my q at around 90 stacks. This time the 'echo' damage happened which leads me to believe that it is a glitch and either the w is ment to activate it but doesn't OR the q isn't ment to activate it but does.

Recreation steps:

1. Pick Katarina
2. Get Ludens Echo
3. Reach 90 stacks, and go into a group of minions and activate your w.

• As i have seen, it should not work.

4. Reach 90 stacks again, go into a group of minions, activate q.

• This should work.

Hope this helps, i will keep trying to test it on various champions to see if it happens again.

Also, I know a screenshot would be helpful but it is impossible to time correctly, and i dont have any video making programs that i know of.