idk if someone mentioned it in the comments of a previous ch, but doesn't the time skip mean that Tanigawa still has that stalker dude from the restaurant bothering her? At this point it's pretty obvious that he's not the killer, but he still has some blackmail over Tanigawa, so it's kinda weird that there wasn't at least a panel where Yamano goes to the house again and swipes the diary and files. The hard part would probably be explaining to Tanigawa anyways since in this timeline he shouldn't have any knowledge of the guy.
It's a pretty inconsequential arc to the overall story, but it does have me a little worried that with all of these different plot points and suspects that the author might begin to lose track of more important stuff to the overall plot.