This is just a small thing, but it would look tidier if it gets fixed. 
When the content exceeds the Text area height, a scrollbar appears that overlaps with the dynamic content button. Not sure if it would be possible for the button to recognize the scrollbar and move more to the left in that case.
@Misho, this is kind of a nuance of different operating systems and browsers and contextual content…at this time it likely won’t make it into this release as it would require us to use some scripting to determine the presence of a potential scrollbar, the width of said scrollbar based on the operating system, and then dynamically moving the icon over based on if it comes in and out, as the icon is absolutely positioned to fit inside the textarea control like that. I will note this down though as a potential improvement down the road.