The problem is as below:
Vertical gray bars keep appearing on the right side of my text boxes. They are wider than the ones that appear on the right side of cards, and usually appear later, when I’ve moved on to a different tile. They do not seem to show up when I view the same dashboard using online PowerBI. I can’t find any way to hide these bars or otherwise make them go away in PowerBI Desktop.
The solution is easy:
Those are scroll bars. You need to widen the text box or shrink your font. Also, depending on people’s screen size, they may see the scroll bar where you do not. I always make it a little bigger than necessary.