I find the plot really confusing and too much of a plot holes... Spoilers down below..... ...

The plothole you mentioned isn't it because she knows about the Luca's struggle because she is with that f*cker the one who greedy about Luca's wealth, she got scammed by this guy in her first timeline, she followed his order bcs he is threatening her about Luca

So that's how she knows what Luca gone through

And isn't there a time where she doesn't know the scene where Rudiger and Luca in carriage when they are running away from the pursuer, she said "did i read something like this in novel?" Like she is questioning why she doesn't know what happen with Rudiger and Luca private moment in the carriage even tho she read the book

So there is part of moment where she doesn't know, not all she knows, but I'm not sure if she is dead or not by this time cause if she is, then it is questionable why she knows that they got chased and so on, if she isn't dead, then there is a possibility she can know they are being chased but didn't know specifically what happen in the carriage, she just assumed things

I agree with you. I also want to add how she practically always mentions how the character's personalities are really different from "the novel she read" probably because her personality and situation was different from the 1st and 2nd timeline, that's why their approach to Judith was different

1st timeline Judith was kinda nasty and was being threatened by that fucker = not so good personality from others

2nd timeline Judith was a mother figure, shows how much she loves luca = nice and lovable personality from others

There are plenty of plotholes.. like when Judith remembers Luka being taught how to read in Winterland.. how Luca struggled to learn and many more instances.. how can Judith know when she is not there... I can understand the other situations like Franz assassination attempts cause she joined hands with him... But I can't really believe how Judith knows Luca's personal experience inside Winterland

Following the recent chapter update, there's another speculation that the thingy / treasure that Luca made wish for, is the one who give the vision of both Luca and Judith past life so maybe Judith have some of Luca's memories

Well for me i just think, since she joined hand with Franz, isn't it simple for Judith to know what happen in Winterwald, don't she have to investigate what's going on in that household, in order to drag it down like she wanted. It is like..
Luca is a person she cared about in past life, so won't she inquire what happen to him when he is in Winterwald? For sure, she don't get to witness it, but she CAN know what happens

Because even in old chapters, she just said that she knows Luca's struggle when he is young but she didn't say that she SAW it herself, for me it is like...she knows it from a third party, SO either she gets some of the Luca's memories OR she has investigate Luca before when she joined hand with Franz