It feels like there are some scenes or a whole chapter skipped between ch 51 and 52.
No, its chapter mix up ch 52 and 53 are mixed up, ch52 should be ch 53, and ch 53 should 52. There may be another chapter or two missing that should be inserted after ch 51 and "53"
It feels like there are some scenes or a whole chapter skipped between ch 51 and 52.