I've recently serviced my bike and the derailleur cable/housing keeps getting tighter and tighter until the ferrel on the cable starts bending. I've noticed it happens after I bottom out my rear suspension. At home I pull the cable through the frame so that there is a lot of extra housing near the derailleur area to give it some more slack. However, during the ride it remains fine but eventually the cable/housing gets tighter and tighter and my shifting performance decreases. Does anyone know why this is happening? The cables and housing were replaced yesterday so they are brand new.
As you can see in the photos, the housing and gear cable is pretty long so there's no problems in length (I think) 1st image: what it looks like after riding 2nd image: after fixing it 3rd image: lots of room for cable at the front near shifter