It is at this point that the movies attempts to impress you with their twist. He wasn't really stuck in a time loop, he just murdered his girlfriend during their fight when she says she is leaving him. The nosy innkeeper was just the building's super knocking on the door to see if everyone is okay on account of the domestic disturbance they had been causing. After he kills her he smokes a cigarette and sees that there are 2 left in the box. That one time were he wrote in the sand? You know that thing that only happened in ONE of the loops? Well after he kills her he grabs the box cutter and carves their initials and a heart into her back.
It seems like what they were going for was a "the recurring things from the looping days are just objects and things he noticed on the night the he killed her" but they even do THAT poorly because they only nod to a couple things and they could have done so much more with the concept. For example they displayed the yellow high heels in the thrift shop very prominently on both day 1 and day 2. But there weren't any yellow high heels in the room when he killed her or if there were they weren't featured or I missed them. But in addition to that they could have had Bobby take her to a DIFFERENT shop only to see the same iconic yellow high heels there. It seems like they wanted to make some things in the loops be like touchstones to reality, but they just didn't execute on that at all. They could have made it so Bobby was trying wildly different things during the day only to encounter the same shoes in different places, or see the same exact lunch in different restaurants. Maybe give some kind of indication that he's actually trying to change things only to have the same iconic imagery appear in different ways. But no, that would have been a good movie so they don't do anything like that.
Every single day Jules mentions that she is going to call her mom and let her know that she's alive. They could have tied this in by having Jules phone be ringing after he killed her and show that it was a call from her mother. Maybe that would be a bit too much like part of the "Playtest" episode of Black Mirror, but at least it would have been ACTUALLY using the recurring events of the loop to tie to the actual events of the murder. As far as I can tell all they really tied from the loops to reality was the cigarette box with 2 cigarettes, and the initials he wrote into the sand. And I *think* that the BnB owner Gene was also their superintendent like I mentioned earlier, but even that was not explicitly shown to be the case and is just me giving them the benefit of the doubt for what they seemed to be trying to say.
There was also the letter that Juliet wrote to Bobby, but that part doesn't make sense either. Because it seems like he didn't even read the letter before he killed her. It seems that he just killed her as a reaction to her breaking up with him in person. BUT when the letter actually gets read the letter is her breaking up with him, and saying that she's doing it by letter because she doesn't feel safe around him and doesn't want to be around him when he loses control. So if she was really breaking up by letter then why did she break up in person?
As a time loop movie it fails because the loops are sloppy with no proper explanation and they are constantly dragged down by the main character's poor decisionmaking.
And as a not-time-loop-but-actually-he-killed-her-movie it STILL fails because they did not sufficiently tie recurrences from the loop to the reality of the crime scene.
And to top it off the movie ends with Bobby still denying that he did it and so I guess he's just a crazy person now? Because there was definitely no ambiguity about the situation.
It's just all bad. And I'm sure I didn't explain it as well as I could have, or maybe I focused on too many of the wrong details, but you'll just have to take my word for it that the movie itself is not any better than my version of it.