Maybe. There is a SPR (1239354) about dangling dimensions in Detailing Mode. If I follow the step by step instructions in that SPR, I can replicate the dangling issue. If your workflow did something similar, that may be the cause. The problem centers around the ‘Save model data’ checkbox in the document properties under the Performance category.
I looked at that SPR (Which I just learned how to find! Yay). The thing is, that checkbox, “Include Detailing Mode Data when Saving” is checked by default. I didn’t retroactively activate that feature after starting the drawing, as is described in that SPR…