With nosplitscroll the last focused window is scrolled when a new split is opened in the exit_cb function of a terminal popup

[bfrg]

Steps to reproduce

1. Run vim --clean -S test.vim, with

vim9script
set splitbelow
set nosplitscroll
setline(1, range(100))
normal! G

const ptybuf: number = term_start(&shell, {
    hidden: true,
    exit_cb: (_, _) => {
        close
        help
    }
})

popup_create(ptybuf, {border: []})

2. Close the shell by typing exit in the terminal popup (or alternatively, depending on the shell, press <C-d>).
3. Result: The help window is opened and the popup is closed. But the previously focused window has been scrolled.

Expected behaviour

No scrolling when a window is split in a terminal callback function.

Version of Vim

9.0.500

Environment

Linux

Logs and stack traces

No response

[bfrg]

cc @luukvbaal

[bfrg]

Fixed by faf1d41.