Im thinking its because of this post last month on this subreddit asking why the number was 88 and there were a handful of jokes about him being a nazi in the comments:
(https://www.reddit.com/r/leagueoflegends/comments/176df5w/why_is_jax_hockey_jersey_number_88_important_to/)

image from skin spotlights a month ago:

https://preview.redd.it/ly8c5ixz950c1.png?width=469&format=png&auto=webp&s=cddcff8c1f74cd4a691dfab42022394930caffa8

image of my game today:

https://preview.redd.it/lmnu8d3z950c1.png?width=1920&format=png&auto=webp&s=5e3cc77b1ac0ae8d9edd6bc7d94929502d095fa2