[BUG] Markdown in widgets doesn't work unless surrounded by blank lines

[jn64]

Describe the bug

Markdown in widgets doesn't work unless surrounded by blank lines.

Expected behavior

Inline Markdown should work in widgets as it does outside of widgets.

To Reproduce

Copy and paste following code block into a new tiddler with type text/markdown on https://tiddlywiki.com/plugins/tiddlywiki/markdown/

## 1. One line

<$list filter="[title[HelloThere]]">~~<$link/>~~</$list>

## 2. Own line

<$list filter="[title[HelloThere]]">
~~<$link/>~~
</$list>

## 3. Blank lines

<$list filter="[title[HelloThere]]">

~~<$link/>~~

</$list>

## 4. Blank line after

<$list filter="[title[HelloThere]]">
~~<$link/>~~

</$list>

## 5. Blank line before

<$list filter="[title[HelloThere]]">

~~<$link/>~~
</$list>

Result

Only example 3 works (Markdown surrounded by blank lines), but adds unwanted paragraph <p>, making it unsuitable for uses like TaskManagementExample (the checkbox and "Go to Mordor" would be on different lines).

1, 2, 4 don't work (~~ is printed literally).

5 works for the Markdown, but breaks the rest of the widget output.

Strikethrough ~~ was chosen as it's more obvious visually. Bold ** __ and italics * _ are also affected.

Screenshots

TiddlyWiki Configuration

TiddlyWiki 5.3.6
Included Markdown plugin
Node.js 22.11.0

All relevant parser settings in TW and Markdown plugin are default.

Additional context

All 5 examples work if the tiddler has type text/vnd.tiddlywiki (or blank).

Workaround for Markdown tiddlers

Use HTML in the widget (e.g. <s> for strikethrough):

<$list filter="[title[HelloThere]]"><s><$link/></s></$list>

For TaskManagementExample:

<$list filter="[!has[draft.of]tag[task]tag[done]sort[created]]">
<$checkbox tag="done"> <s><$link/></s></$checkbox>
</$list>