<br> tag added by WYSIWYG produces markdown that does not render correctly

[blikblum]

Describe the bug

When a br tag is present followed by a text with a link, the link is not rendered as html when parsed by marked and dingus (commonmark spec parser)
This occurs when using TUI Editor in WYSIWYG mode

To Reproduce

Steps to reproduce the behavior:

1. Start editor in WYSIWYG
2. Add two or more new lines
3. Add a text followed by a link
4. Use getMarkdown api

# Hello

Text

<br>
Hello [link](https://marked.js.org/) 

Dingus: https://spec.commonmark.org/dingus/?text=%23%20Hello%0A%0AText%0A%0A%3Cbr%3E%0AHello%20%5Blink%5D(https%3A%2F%2Fmarked.js.org%2F)%20%0A%0A

Marked: https://marked.js.org/demo/?text=%23%20Hello%0A%0AText%0A%0A%3Cbr%3E%0AHello%20%5Blink%5D(https%3A%2F%2Fmarked.js.org%2F)%20%0A&options=%7B%0A%20%0A%7D&version=master

Expected behavior

The produced markdown should be rendered by spec compliant parsers like marked and dingus

Screenshots

If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: Linux
• Browser Firefox
• Version Ubuntu 20.4

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context

Adding a new line after br tag, fixes the issue:

https://spec.commonmark.org/dingus/?text=%23%20Hello%0A%0AText%0A%0A%3Cbr%3E%0A%0AHello%20%5Blink%5D(https%3A%2F%2Fmarked.js.org%2F)%20%0A%0A

[ethanfann]

Same thing happens with <br> followed by a header, and the header won't be correctly rendered.

Example:

<br>
# This WILL NOT WORK