Quick summary

Cutting and pasting text from and to the title of a new post breaks the editors rendering.

Confirmed WordPress.com only, FF only.

Steps to reproduce

1. Create a new post
2. Type out a title "test title and stuff"
3. Select "and stuff"
4. Cut the text with ctrl/cmd+x
5. Hit backspace
6. Move the cursor to the start of the title (hit home key, but this doesn't seem to matter)
7. Paste the text ctrl/cmd+v

Undo to get back to safety.

What you expected to happen

What actually happened

Context

Writing a p2 post

Browser

Mozilla Firefox

Simple/Atomic

Simple

Other notes

Doesn't seem to be any errors in the console.

Reproducibility

Consistent

Severity

Some (< 50%)

Available workarounds?

Yes, easy to implement

Workaround details

Don't use copy and paste.