Consider this macro:

sub test()
  doc = StarDesktop.loadComponentFromURL("private:factory/sdraw", "_default", 0, array())
  page = doc.getDrawPages().getByIndex(0)
  doc.lockControllers()
  shape = doc.createInstance("com.sun.star.drawing.TextShape")
  page.add(shape)
  shape.setString("Some Text")
  point = new com.sun.star.awt.Point
  point.X = 2000
  point.Y = 600
  shape.setPosition(point)
  shape.setPropertyValue("CharWeight", 150)
  doc.unlockControllers()
  doc.storeAsURL(ConvertToURL("C:/Downloads/test.odg"), array())
end sub

It creates a new Draw document; locks its controllers; creates and inserts a TextShape; sets its text, position, and weight; unlocks controllers and saves. (NB: change the path inside ConvertToURL to a path suitable for you when testing.)

The created document is displayed immediately as saved and unchanged; and the text is shown bold, as expected. However, File->Reload changes the text to normal.

Commenting out `doc.lockControllers()` and `doc.unlockControllers()` fixes the issue (but of course, that's not a solution: lockControllers helps improve performance, and should not create such a problem). The resulting document.xml has a paragraph autostyle (setting bold) used in <text:p> of the <draw:text-box>, unlike the case when controllers were locked (even though another paragraph autostyle, also with bold, is set in draw:text-style-name in <draw:frame>).