[BUG] Modified Symbol Instance reverts to base symbol on save and reopen


#1
  1. Create a symbol (say, rectangle and some text)
  2. Add instance of a symbol to an artboard
  3. Modify instance (change text)
  4. Save file
  5. Close Lunacy
  6. Open the file
    – instance of the symbol lost the changes and has reverted to original symbol text

Unable to save - lost work every time