[vim/vim] Lines overlap when vim in tmux (Issue #11230)

[Cyker Way]

Steps to reproduce

set nocp
hi Normal ctermfg=15 ctermbg=0
for i in range(100)
    echo i
endfor

1. Save above script as a.vim.
2. Run vim -u NONE -c "so a.vim" in a tmux session, in a terminal whose height is 30 lines.
3. Press f then b.

Output:

00
11
22
33
44
...

Problem is when press b new text overlaps old text. The hi Normal command is necessary to reproduce this issue.

This could be vim or tmux issue, or both. I am not sure but trying to ask.

Expected behaviour

Correct output:

0
1
2
3
4
...

Version of Vim

9.0

Environment

Fedora 36.

Logs and stack traces

No response

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[Cyker Way]

Possible duplicate of #8973 Differences:

• Doesn't need termguicolors to reproduce.
• When press fff instead of fb, some lines are not displayed.

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[Cyker Way]

Possible duplicate of #8973 Differences:

• Doesn't need termguicolors to reproduce.
• When press fff instead of fb, some lines are not displayed.

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[Cyker Way]

Possible solution #8973 (comment)

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[Cyker Way]

Closed #11230 as completed.

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