Need help working from home with your Bentley software? We're here to help - click here
Any changes to the annotation scale while in dwg mode will not be saved into the dgn.
This operation should be done before saving the dgn file to a dwg file.
If you export the dwg file to a dgn, then you can change the annotation scale with no issues.
Otherwise, when you open the dwg file, it will remain with the original annotation scale.
Annotation Scale Simplified - AskInga