Undo does not work correctly for MathJax blocks in editor

[JeppeKlitgaard]

It happens fairly regularly that I accidentally delete a large MathJax block with backspace in the editor only to find that I can't resummon it with the undo command, which can be frustrating when the block was large and complicated.

[abdnh]

It's a known issue: #2429

[JeppeKlitgaard]

My apologies, I tried searching around but didn't find the issue in question. Feel free to close this.

I agree with the comment in the other issue that this is a fairly big paper-cut for me and I suspect other math-heavy users.