REBASE_HEAD still exists after success end rebase

[Long 76 <long76.git@mail.ru>]

Hi,
My configuration:
OS Kubuntu 24.04
Git version: 2.54.0 from ppa:git-core/ppa

.gitconfig
[merge]
     guitool = meld
     tool = meld
[core]
     editor = code -w
     autocrlf = input
     quotePath = false
     eol = lf

[global]
[diff]
     tool = meld
[gui]
     editor = code
[fetch]
     prune = true
[mergetool]
     keepBackup = false

How to reproduce:
1) Made repo
# Init repo with README.md
git init
echo -e '# Git rebase bug\n\n```\ngit rebase master\ngit mergetool\ngit 
rebase --continue\ngit rev-parse REBASE_HEAD\n```' > README.md
git add README.md
git commit -m "docs: add README.md"

# Add feature branch
git branch feature_branch

# Add files in separate commits
echo -e "Text 1 line\nText 2 line\nText 3 line\nText 4 line\nText 5 
line" > Text1.txt
git add Text1.txt
git commit -m "feat: add Text1.txt"

echo -e "Text 1 line\nText 2 line\nText 3 line\nText 4 line\nText 5 
line" > Text2.txt
git add Text2.txt
git commit -m "feat: add Text2.txt"

echo -e "Text 1 line\nText 2 line\nText 3 line\nText 4 line\nText 5 
line" > Text3.txt
git add Text3.txt
git commit -m "feat: add Text3.txt"

# Do the same in feature branch and one more in one commit
git checkout feature_branch
echo -e "Texts 1 line\nTexts 2 line\nTexts 3 line\nText 4 line\nTexts 5 
line" > Text1.txt
git add Text1.txt

echo -e "Text 1 line\nText 2 line\nText 3 line\nText 4 line\nText 5 
line" > Text2.txt
git add Text2.txt

echo -e "Texts 1 line\nTexts 2 line\nTexts 3 line\nText 4 line\nTexts 5 
line" > Text3.txt
git add Text3.txt

echo -e "Texts 1 line\nTexts 2 line\nText 3 line\nTexts 4 line\nText 5 
line" > Text4.txt
git add Text4.txt
git commit -m "feat: add all files"
2) Call — git rebase master
3) Call — git mergetool
4) Call — git rebase --continue
5) Call — git rev-parse REBASE_HEAD
Last command return value and .git/REBASE_HEAD exists.
In other words REBASE_HEAD exists if ogirinal commit in new branch 
modified and need call git push --force to send it to server. Please fix 
it, thanks!

--
Long76