Problem importing symbol with change on style

Principle Version: 5.8
macOS Version: 10.14.5
Sketch Version: 55.2

Description of what you need help with:
When importing from sketch a symbol that has a style inside of it that has been changed but not updated in the styles panel, it still gets the old value instead of the current style.

Steps to reproduce the behavior:

  1. create a symbol with a square in it and give the square a style
  2. change the colour of the square within the symbol but don’t update its style
  3. import to Principle
  4. this should import the symbol with the original style before the edit

Screenshots/Sketch File/Principle file:

Also I’m loosing some shadows from Sketch when imported to Principle, is this a known bug too?