Plain text paste does not preserve line breaks — multi-line text is flattened into a single paragraph

[yannishin]

What’s broken?

When pasting plain text containing line breaks (\r\n / \n) into the BlockNote editor, the line breaks are not preserved. All lines are flattened into a single paragraph, separated only by spaces.

This is reproducible on the official demo site (https://www.blocknotejs.org/demo) without any custom configuration.

What did you expect to happen?

Each line in the pasted plain text should map to a separate paragraph block (or at minimum a soft line break). Plain text line breaks carry meaning and should not be collapsed into spaces.

Steps to reproduce

1. Open Windows Notepad (or any plain-text source — Notepad++, terminal output, etc.) and type the following on separate lines:

   line1
   line2
   line3
   line4

2. Select all and copy (Ctrl+C)
3. Open https://www.blocknotejs.org/demo
4. Click into the editor and paste (Ctrl+V)

Actual result: A single paragraph — line1 line2 line3 line4

Expected result: Four separate paragraph blocks, one per line.

BlockNote version

No response

Environment

No response

Additional context

• Source: Windows Notepad / Notepad++ (CRLF), also reproduces from other plain-text sources
• Target: https://www.blocknotejs.org/demo
• macOS Chrome and Windows Chrome both reproduce
• Default configuration, no custom paste handlers

Contribution

• I'd be interested in contributing a fix for this issue

Sponsor

• I'm a sponsor and would appreciate if you could look into this sooner than later 💖

[YousefED]

Thanks, we'll look into this