Horizontal lines of removed chunks never go away

Describe the bug

Once you remove a code chunk the horizontal lines delimiting it stay.

Then I remove the # %% line:

Then I remove everything:

Also, can you add an option to completely remove those lines? They are quite invasive, specially the thick one above. Moreover, even when the cursor is not inside a chunk, the last selected one keeps being surrounded by those lines, which is very misleading.

To Reproduce

I think it's clear from the description above.

Can you fix this issue by yourself? (We appreciate the help)

No

(If applicable) Please attach setting.json

  "[r]": {"editor.tabSize": 2},
  "r.rterm.mac": "/Users/carlos/.venv/bin/radian",
  // https://github.com/REditorSupport/vscode-R/issues/809#issuecomment-935947010
  "r.bracketedPaste": true,
  "r.plot.useHttpgd": true,

Environment (please complete the following information):

• OS: macOS Tahoe
• VSCode Version: 1.125.1
• R Version: 4.5.3
• vscode-R version: 2.8.8

Reproduce the issue in a VS Code R file by removing a chunk, its # %% line, and then all content. Start by tracing the vscode-R logic that draws chunk boundary and selection lines; verify that decorations disappear when chunks are removed or the cursor leaves them, and that any setting for disabling the lines works.