Python Interpreter Bug Example

The class definition:
import xbmcgui
JUSTIFY_CENTER = 2
class RowItem(xbmcgui.ControlGroup):
    def __init__(self, X=0, Y=0, width=380 , height=280, bgdSegmented=False, textColor='0xFFFFFF00',
                 bgdColor='0xFFAA0000', alignment=JUSTIFY_CENTER, font='font12'):
        pass

Code instantiating the class:
item = RowItem(X,rowY,width,height,bgdSegmented=False,bgdColor='0xFFFF00FF', alignment=0)

Error Generated by Kodi Python:
"/storage/.kodi/addons/service.ltvpl/addon.py", line 198, in PlaylistConstructor

alignment=0)

TypeError: function takes at most 4 arguments (7 given)

Clearly, all of the arguments defined in init are kwargs except the first. Why did Kodi Python think that there are 4 positional parameters and why did it reject the kw parameters as being excessive? In order to get the code to run, I had to eliminate the kwargs when instantiating the class. Obviously, doing that is not a proper solution.

By the way I specified xbmc.python version 2.24.0 in my addon.xml file.

In the for what it's worth department, I ran a modified version of the above code under Linux (Python 2.7.13) on the same system Kodi is running on and did not get any errors at all.