Thank you very much for this answer, I hadn't updated myself on the new greensock, I will definitely use it on my next projects!
I've taken my sticky bar out of the scroll locomotive container so I don't have to worry about that anymore.
So I modified my code like this
https://codepen.io/christophedelamare/pen/zYRNYmP
I have one last question, how can I create a scroll effect with the texts rather than a brutal replacement?