Issue with paragraph starting with three or more *

[fxha]

Description

A paragraph starting with *** is correctly interpreted as horizontal rule but if we want to write **bold** by typing two times *, it's still recognized as horizontal rule.

Steps to reproduce

1. Create a new (empty) paragraph in preview editor.
2. Write * (--> **) and another * to get **<cursor** - the text block is recognized as horizontal rule (HR) 👍.
3. Write some text as bold like **foo** - the text block is still recognized as HR 👎.
4. Press enter or put the cursor into another line and the paragraph is displayed as HR.

Expected behavior:

The line should be a normal paragraph/text.

Actual behavior:

The line is recognized as horizontal rule.

Versions

• Mark Text: v0.16.0-rc.x (pre-release only)
• Operating system: all

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Hint: I guess that this is an issue that has been created by isAllowedTransformation validation in Muya's paragraphCtrl.js file because we don't allow transformations from horizontal rules due to transformation issues with other markdown elements (multiple crashes in Muya).