In a DGN drawing, texts were placed in a design model. These are TrueType fonts, e.g. Arial, and are usually displayed filled. If this design model is now referenced in a sheet model, the texts are suddenly outlined and no longer displayed filled.
The problem with the outlined texts is caused by the following setting:
In the dialog Reference manager > Visible Edges > click on the column entry ‘Cached’ > click on the Options (cube-icon) and deactivate the option ‘Process Text and Dimensions’ Or change Cached to Dynamic.