i’m sure there’s no definite answer/reason for him remembering this time but maybe it’s because he didn’t die with Gunwon this time ? like maybe in the previous loops he died with Gunwon when he fell off the cliff the first time rather than dying solo. maybe that could also mean that Gunwon could be aware of the loop because he died solo this last loop too.
THATS MAINLY MY GUESS THO that he remembers because he died alone

Why did jiwoo/jinwoo? Remember him this time??