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
Rimworld. I play on a difficulty so high I haven’t been able to beat it yet, but I’m too stubborn to turn the difficulty down because it’s fun.