Backspace/Delete across paragraph boundaries (merging paragraphs) causes the page to abruptly scroll on Internet Explorer 11.
The issue doesn't seem to occur in short articles (?). It doesn't occur on Edge or other browsers.
This sounds similar to T73119, but that issue apparently occurred for any Backspace/Delete operation, not just across paragraphs.
Originally reported here: T73119#4947167
Example page where this can be reproduced: https://en.wikipedia.org/wiki/Symptom?veaction=edit