This is a common occurrence for me since I don’t have much time to play. I often get about halfway through and then stop playing for months. When I come back to it I always want to start from the beginning and then the cycle happens again.
One example for me is Fallout 4
Metal gear solid the phantom pain
Love the game but lose steam I think about 3 quarters of the way through because there is just so much and I always feel the need to do every side objective