[GAMEPLAY] Kindred W bugs with cooldown reduction (?)

So, i had build 40% CDR on Kindred -> reducing W cooldown to 8,4 seconds (on max skill rank) the duration of the W is 8,5 seconds -> i should have my W up again, when the initial W ends (standing inside it, not walking!)

but that doesn't happen... W goes on cooldown for 2+ seconds (the cooldown timer starts with a "2" shown)

I assume this is buggy and not intended behaviour?

on a side-note: kindred passive is kind of super awkward on twisted treeline ... (i play dat map mainly, me no like summoners rift^^)