Quinn sometimes can't autoattack after vaulting off of an enemy using a mobility spell

I play Quinn regularly and this is the first instance I can think of where this has happened to me. I was facing a Riven , and the following happened:

-Targeted Riven with Vault -Riven used her Q (first or second hit) to dash away mid vault -Vault went off but the jump back effect didn't (fully?) trigger, leaving me near the impact location -For a few seconds I couldn't autoattack targets in range (Maybe couldn't move? Can't confirm.)

I can confirm the following: -No lag or connection issues -I was not targeted by any of Riven's CC spells

I looked back and saw one other (long dead) post with a similar problem against Jax and Katarina . I usually have no problem vaulting off of targets using mobility spells. In fact, I often use it to cancel or chase them. This is the first time I've seen this, but it has the potential to be very gamebreaking under the wrong circumstances.