[Bug] Hangs editor tab on pasting invalid text block.

[chernser]

Bug Description

Description

When pasting an invalid text into an editor (VSCode) no text is inserted only spinning wheel shown. When extension is disabled - everything is fine.

I've attached GPT generated text file where I've borrowed this wonderful text

invalid_markdown.md

Steps to Reproduce

• Copy invalid text into an md document
• Observe no text is inserted

Expected Behavior

• no delay on text copy-pasting

Actual Behavior

no text is inserted only spinning wheel shown

Environment

• Mac OS 15
• m3

Sample Input

#InvalidHeading42
## Duplicate Heading
## Duplicate Heading
Heading setext style but broken
---=
>NoSpaceBlockquote42
*Unclosed emphasis line 42
**Mismatched bold* 42
Backtick `unclosed code span 42
[Broken link text 42](not a url)
[ref style link 42][missing-ref-42]
Image with empty alt ![](http://example.com/img42.png "title with "quote")
![bad](not a url 42)
<div class=test><span><em>Unclosed HTML 42

Configuration File

default

Additional Context

No response

Code of Conduct

• I agree to follow this project's Code of Conduct