[GAMEPLAY] Garen villain passive not working

While trying out the new Garen in a teambuilder game, his ult's villain-passive stopped working mid-game. At first when I levelled my R everything was fine and I could see the villain and correctly use the passive, but after dying while my ultimate was on cooldown, no new champion was labelled as the villain once I respawned although during the time I was dead I could still see Azir as being the current villain. Throughout the rest of the game I haven't seen any champion's portrait next to my health bar nor the icon that should be above the villain's head and I don't think any ennemy was considered as being the villain although I didn't check every ennemy to see if they had the villain "debuff". I'm not quite sure but this might be related to the fact that the ennemy team didn't get a lot of kills after the death that seemingly triggered the bug. I am joining the log of this game, hoping you may find how this bug happened, sorry that I didn't get to recreate the bug in another game to better understand it.