No, what L&P told me is that if we don't forgive Logan it will end the Ellie Sophia route in the future. The shower scene might still happen, but i think on Playable Day 16, when the criteria will be checked, the event won't happen and we will be out of the route. This is something common on the Ellie Sophia route.
Like if Pat and Sophia don't kiss, Ellie Sophia can't progress. If we Choose Alyssa over Julia, Ellie Sophia ends. If we don't continue to watch porn Ellie Sophia ends. If Ellie doesn't choose Julia to kiss instead of Elena, Ellie Sophia will end. If Sophia doesn't pretend to be Ellie's friend Ellie Sophia ends. Even if we don't enter the Shower Stall with Patricia it will lead to an end of the Ellie Sophia storyline on Day 16.
So it's something normal in this route.