[GAMEPLAY] Spectator bug with yellow effect

I've seen this a couple times on LCS, at some points in the game, this yellow thing pops up for just a second. It goes away quickly so it's not that big of a deal, but it's enough to notice and be slightly annoyiing I've only noticed it in games with Cosmic Dawn Rakan, if that helps. I've included some screenshots and below you can find a couple Twitch clips to see it happen for yourself.

https://clips.twitch.tv/DependableZealousClipzArgieB8