Text boxes "forget" their right margins

I found out more details of what is happening: when I copy or paste a slide, in some cases the text formatting of my slide main body is changing incorrectly between copy and paste. See this Peek video for the details: https://360.articulate.com/review/content/7582fbdc-7542-4ce6-b6b5-41b821fbec71/review

In other words, there appears to be a copy/paste bug that changes the setting of the text field when the slide it is on is copied and pasted somewhere else. Note that this does not happen when I drag and drop the same slide from one place to another, only when I use the copy/cut and then paste functions. Also, I could not get it to happen in all cases. But the attached story file exhibits this behavior. I will also send in a ticket.

So, the long and the short of it is that copying and pasting slides was introducing this unwanted (and incorrect) formatting change.