Posting for a friend for accessibility needs:
Player was in a +10 mythic run of Floodgate. All players knew mechanics, run balls over good water pools to neutralize.
2 players ran ball over 3 different puddles and the puddles would not neutralize the balls. Both players were eventually touched because the puddles would not eat the balls. They both saw this error and were talking about it in party so friend told me to report it in bug report so it can be looked into.