When a post is moved to a new topic, the followers (those who watched the topic) of the original topic becomes automatically followers of the new topic (the moved reply).
while the notification level for the new topic should be set to Normal for users other than the original poster.
Continuing the discussion from I get notifications for topics I haven't chosen
This is by design, @gerhard recently worked on this. The users expressed the will to watch the original topic so we assume they want to watch the new topic.
aha, thanks for the declaration.
I can argue that most of the times, they don’t. because the new topic is something that doesn’t fit in the old one, otherwise it won’t get moved into a new topic.
I can share our user experience on this:
as a user during the past week, I was getting some notifications I didn’t want to! this happened for some of users as well, described in this topic: https://meta.discourse.org/t/i-get-notifications-for-topics-i-havent-chosen/129187.
our users complained us about it as we have violated their privacy by sending them notifications they didn’t chose to received!
I think privacy violation here is a bit extreme of a position to take here.
Going to leave this to @codinghorror to decide, I am on a fence. May take him a while to reply here as he is out.
Assuming:
User (A,B,C,D) are watching topic X
User B posts
User C posts
User D posts
Mod splits off B,C to topic Y
Option 1 (currently happening)
A,B,C,D are now watching topic Y
Option 2
B,C are now watching topic Y (A,D are not)
Option 3
(something else) B,C watching topic Y, A,D tracking?
Jeff your call as to what you want here.
I agree that this is not a privacy violation, no matter how loud they state it. But I liked that post because of this logic:
So only the posters who are already discussing something different should watch the new topic:
I corrected the option by changing B to D
maybe I’m using a wrong word/context. their criticism was of course for us, and not to discourse. what they have said to us was this:
we feel that you are not respecting our interests, and you’ve forced us to follow some topics from specific users*!
{*we have 2-3 specific users with extra activity in our forum, who sometimes start extra discussion in a topic and we need to move their replies into a new discussion!}
It seems there is only two options on the table, new way or old way, but in both ways the system decides.
I know there are holes in the following ideas, but it is just a compass bearing and not a detailed map.
Perhaps instead of the system deciding a new user option is added that allows a user to decide when a post is moved if they follow those post automatically (I think of this as the passive option).
Another option is that they are prompted when they visit either topic again and choose which of the post they want to continue to be notified. (I think of this as the active option).
I think that subscribing to the new post all users that have been subscribed to the original post is the correct solution, as it is now.
The users have not control of when an admin or mod can split a thread.
If they are interested in the theme of the post that is split, and they are not subscribed to it, they miss the opportunity to read what other people has to say, or even read that post if it is spitted before they read it, so they cannot know if it is of interest for them or not.
If they are subscribed to it and they are not interested, they always have te opportunity of unsubscribing from it.
I agree with Remah, any user whose post got moved to the new topic should watch, everyone else should be left untouched.
@techAPJ can you make this change?
cc @techAPJ
El problema es que, en esta situación, no existe una solución buena o mala. Cuando los usuarios están observando o seguendo un tema específico y una publicación se mueve a otro tema, algunos usuarios desean ser notificados sobre los cambios en ese nuevo tema y otros no.
Decidimos revertir ese cambio y simplificar la base de código, ya que ese ajuste agregaba mucha complejidad para soportar ese caso especial. Por lo tanto, cuando se mueve una publicación, el nivel de notificación actual del usuario se mantendrá en el nuevo tema.
No estoy de acuerdo.
Cuando una respuesta se mueve a un nuevo tema, significa que se considera fuera de tema para la discusión anterior, y es mejor que sea un tema nuevo. ¿Por qué deberían los usuarios estar interesados en discusiones fuera de tema?
Entendido, lamentablemente necesitarás un plugin personalizado aquí para cambiar esto. La lógica es demasiado compleja para mantener este caso especial y el cambio estaba causando otros errores graves.
El software no tiene forma de saber si estás separando algo porque:
Se podría argumentar que, si a nadie le importa, deberías simplemente convertirlo en un mensaje privado o eliminarlo.
¡Exacto! Por eso, si una respuesta está dividida y no se ha eliminado, significa que vale la pena y que otros pueden interesarse; si así lo eligen.
Entendido 
Quizás elegí seguir ese tema precisamente por esa respuesta.
Prefiero tener una notificación de más que una de menos. Y siempre puedo optar por dejar de seguir el nuevo tema después.