Duplicate Text Editor - Glitchy

[TheSupremePatriot]

Operating System : OS X | El Capitan
Browsers Affected : Safari and Firefox
Problem : Text Editor Glitches when Highlighting [When there is a large amount of text in the editor]

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This only happens if there is at least enough text to make the scroll bar on the text editor shrink to about half size... then it starts to do what you see in the video.
Images also cause this issue as well.

 

[silence]

Note: this is also happening on the default editor, not just here.

 

[Chris D]

There's nothing we can do here, it's basically a browser issue.

More details in the original report here:
https://xenforo.com/community/threads/os-x-safari-text-selection-jump-in-editor-issue.110181/