Crystal Wall Animation

Have noticed when you cast crystal wall there is a swirling animation that appears when the crystal is formed

however the swirling animation never appears again

But it does appear when you take your turn in aysnch match

https://steamuserimages-a.akamaihd.net/ugc/961971118485153662/A57B67E900261DD42EE28C196CE2E9F96327CCF1/

Is this an animation bug, oversight, or timing issues