Oddly enough, my faithful to Lea save doesn't seem to be affected by this bug even though I did go with the don't show Emma any porn choice. Perhaps it also matters if you just accept the flowers?
There are 5 states you can end up with Emma: maledom path, femdom path, neutral path (small path for those that like her but don't like the dominant/submissive shenanigans), broke up path, and platonic/friend path.
I need to send the players to the right paths, while giving some leeway: just not picking a lewd scene doesn't mean they don't want Emma, they might just don't like that particular scene. In most circumstances you can (and should!) say no to the scenes/kinks you don't like and usually that doesn't block you off from future scenes with her.
In your case, I'm assuming, you didn't do her scene in chapter 4, in chapter 5 and didn't kiss her - you were correctly sent to the just friends path.
That wasn't the case with the situation before. They did the 4th chapter scene and then things got buggy.
In the future patch, if anyone doesn't do the scene in chapter 5 AND doesn't kiss Emma (regardless of what they did before, like the scene in chapter 4), they'll be send to the just friends path just like you did. If, however, they do either of those, they'll end up in one of her 3 paths (maledom, femdom, neutral) depending on their previous choices.