This is a huge deal for Zyra because you're now able to move quicker after casting her E. Will also make her feel less 'old'.
How long was this problem here?
To be clear this wasn't a bug, it was intended back whenever it was added.
This thread was added on August 17, 2022, with posts from GalaxySmash.
Original Post
Random delays being intended back in the day is a bizarre thing, is there a reason stuff like karthus Q or singed W are still random? Given that the zyra thing is being fixed it might be reasonable to look at other instances of this behavior
We are always open to looking into other instances, but in many cases it is valuable gameplay for various reasons, depending on the context.