Hello,
When I use "Item: Move to media source preferred position (BWF start offset)" with "Options: Trim content behind media items when editing" On, and there is already an item at the destination, the items overlap at the destination, and both play during subsequent playback.
Because "Trim content behind media items when editing" is on, the behaviour I expect would be for the old item at that destination to be trimmed, and not to play. This has caused me problems when repositioning large batches of audio wanting to replace old versions of files on a track without deleting them all beforehand.