If I double-click into the dimension text box (as if to edit it) and escape out of it, the dimension text will then display fully.
I’m having a hard time pinning down the issue as the dimensions affected are at random. Most of the dimensions on a page are unaffected it is usually just a few. I also haven’t nailed down when the “glitch” occurs. When I initially pull the dimensions, they display as expected. I’m guessing it happens when I update the viewport’s model reference, but it doesn’t happen every time.
Look at your text settings in the styles tray and see if it is bounded or unbounded. It might have gotten saves as bounded and the text box doesnt automatically adjust its size. The dimensioning tool defaults to the last saved settings.