When I select a block of text in a manuscript and drag it to a different location, such as an earlier scene or a new chapter, I expect the text to be moved to that location. However, it is instead copied, resulting in duplicated prose at the new location. Is this a deliberate design choice or a bug? This behavior deviates from the typical 'drag & drop' user interface expectations, potentially useful for duplicating text but risky if done unintentionally without noticing that the duplication had happened.