I know this is pretty old at this point, but just wanted to post here with the hopes that it can get looked at again. The Taric W bug is still happening, and it seems to be affecting many different people however not everyone?
I've made a post about this as well a while back, but didn't receive any feedback (This is the first Rioter comment I've seen actually).
https://boards.na.leagueoflegends.com/en/c/bug-report/IEf8y9BF-gameplay-taric-visual-bug
For me personally I'm using an nvidia GTX 750 Ti graphics card, and apart from this bug, the game runs perfectly fine. Plus I can play other games that are much more visually demanding with no problems as well.
I'm not sure what the cause for this effect is, especially as it doesn't seem to affect everyone. Reading this comment thread I see that both the OP and myself have nvidia GTX graphics cards, although different models, and perhaps that's the common link? At any rate, anything that can be done to look further into this and maybe give some insight in a future QA or something would be really helpful.
Thank you~