Shadowed unitframes problem!

Hey there,
I just downloaded shadowed unitframes addon and I'm having some issues with text management. I created a custom text where I want to display the target name, class and race, but whenever I do so some of the text seems to be shortened (3 dots at the end). This clearly indicates that the "invisible" frame which determines the allowed text width is too short for my text. Clearly there is enough space to the right for the text to be displayed, but somehow the addon is complicating it. I tried adjusting the Width Weight slider but nothing changes. The only solution I found is to adjust the font size to a smaller value (-1) instead of (1), but I want it to be at (1). There must be some way to fix this.
Any input is greatly appreciated.
Thanks.

Screenshots:

https://imgur.com/a/kO5Y96I
https://imgur.com/a/Pmgq9TB