When importing a document containing a Picture SDT with TextProperties an exception is thrown: StructuredDocumentTags.Builders.SdtBuilderFailureException: 'This content control type cannot be inserted around a selected image.'
With the current implementation of the RadFlowDocumentEditor`s CharacterFormatting.FontWeight.LocalValue accepts only FontWeights.Bold and FontWeights.Normal and throws an exception when setting different weights (ex. Black, Thin, etc.).