Multileader Mtext box width issue

Looking for clarification on why my multileader mtext box is giving me extremely long text box widths ( grips ). I have been adjusting my annotation / dimstyles, and think I've changed something but can't determine what it is.

As a quick solution, I've edited my current multileaders ( in dwg ) and have manually set their mtext width to zero ( need to do for each instance). This is what I would like for my default settings ( so I dont have to adjust going forward ).

I typically use a background mask for my mleaders, and this is causing overlap on other elements in my dwg.

What have I done to deserve this LOL! Thanks!