Overleaf: Harper Chrome extension inserts blank rows

**Describe the bug**
When opening an Overleaf document while the Harper Chrome extension (Brave Browser, Linux) is enabled, multiple blank lines are inserted automatically in the text.

**To Reproduce**
Steps to reproduce the behavior:
1. Disable Harper Chrome extension for overleaf.com
2. Create a blank overleaf project and open main.tex
3. Enable Harper
4. Observe how new blank lines appear in the text editor magically.

**Expected behavior**
No automatic text alterations. Changes should only happen on user command.

**Screenshots**
Before activating Harper

After activating Harper


**Platform**
Chrome Extension in the Brave Browser (Brave 1.79.123).

**Additional context**
-

Start by reproducing the issue in a blank Overleaf project with Brave on Linux, opening main.tex and enabling the Harper Chrome extension. Inspect the extension behavior around the Overleaf editor and verify that enabling Harper no longer inserts blank lines or alters text without a user command.

Written by the indexing model from the issue text.