[GAMEPLAY] Titanic Hydra/ Devourer interaction

So since 5.16, Master Yi and Xin Zhao have been my go to jungle picks with devourer for there fast clear times and dueling potential. they both have great on-hit effects built into their kit so it's a natural jungling item for them. Because they are so squishy though, i usually build a Titanic Hydra as a 3rd item on them (after BotRK).

The normal Yi combo, after getting sated, would be Ult, Q then E. before your 2nd auto, activate Titanic Hydra for the double active proc, however after the phantom hit, it takes a noticeably long time for the next attack to begin. Is this an intended delay for the item or was it just not expected to be played on a high attack speed champion so it was never tested?

To recreate: get sated build Titanic Hydra activate Titanic Hydra after first auto attack