You have to anchor your text to whatever corner you want it to be in.
The problem might be that it’s anchored to the top-left, then you manually move it to the right, and when you resize the resolution, its cutting off the right side of your text because it’s anchored on the left.
If you anchor it to the right side, it wont cut off on the right.
This might be an issue where you need to just play with all the settings to achieve what you’re looking for.
Scale box has “Stretch” and “Stretch Direction” and SizeBox has a bunch of settings you can mess with.