Do anyone notice that text box is kind of “Shaking” when typing at the end of text box?
I can’t say that I have.
Time to lay off the coffee 
. I don’t think this site even has a feature like that. Might be a feature of your browser.
Hmm, pretty sure i haven’t have any coffee yet 
.
Will try with different browser (currently using chrome) and capture some video if i notice it again 
So this is what happen…
Maybe shaking is not the best description
But it seem that it was due to the vertical text wrapping?
Is your scroll wheel on your mouse maybe rolling back a little?
Don’t think so
Disabled my mouse and tried again, still the same behavior
It seem to only appear on after line26…
I can’t see your whole text box in the video. When you add a new line, the box increases in size, but if the box is already up against the top of the screen, maybe it’s pushing back. I went over 26 lines with mine and I don’t see that happening here. I’m using firefox on a desktop with a large monitor.
Maybe if you pre-stretch the text box (with the triangle in the lower right) it won’t have to add lines, and will stop doing that.
Yea, you are right, it is indeed a browser related issue (currently using chrome)…
I just tried it with InternetExplorer and it work perfectly
I am ok with pre-streching the text box 
, sound like a viable workaround to me. Thanks for the suggestion.