Bold and Italic intersection incorrect Markdown

[Tiberiusss]

Describe the bug

If you use bold and italic at the intersection of a word, then the output markdown will be incorrect

To Reproduce

Steps to reproduce the behavior:

1. Go to "Wysiwyg" tab
2. Enter text "boldanditalic"
3. Make phrase "boldand" bold, then phrase "anditalic" italic
4. Go to "Markdown" tab.
5. Incorrect result is preview. Extra asterisks appeared.

Expected behavior

Markdown will be **bold*****and***​*italic* or **bold*****and***_italic_ and preview:

Editor version: 3.1.0

[js87zz]

@Tiberiusss
Thanks for reporting. I will fix it.

[michpalm]

I believe this I've come across the same or a similiar issue, or related at least (perhaps something about the regex in Markdown marks?). Here I've reproduced it in the example page:

It seems like it only matches part of the syntax and ends up in a limbo state with part html/part markdown 🤔
Output after switching to markdown:

<strong>This text is bold and the last word is also *italic***

And then once again after switching to markdown once again:

<strong>This text is bold and the last word is also <em>italic</em>\*\*</strong>

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Looking at the regex expression in the strong.ts file, it seems like it only matches the starting asterisks for example, if I understand it correctly (checked on regex101 website):