A problem with Arrow

[XiaLeo]

When I use Arrow it goes like this:
https://thumbnail1.baidupcs.com/thumbnail/c1fd78ab7saf91293ecd75855498428f?fid=1235339601-250528-743290651475862&rt=pr&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-5cnRCOzDw4U7NQMSnMUh9OGNnPs%3d&expires=8h&chkbd=0&chkv=0&dp-logid=9190773326098062895&dp-callid=0&time=1649433600&size=c1440_u900&quality=90&vuk=1235339601&ft=image&autopolicy=1

The tip and line seem to be confused in the source code (geometry.py
so that the tip was longer than the line, and the line becomes very tiny.

How can I correct it?

[XiaLeo]

I've spent much time on it and now it's going properly.
In geometry.py right after class Arrow(line):
I added some code

def __init__(self,start: np.ndarray,end: np.ndarray,*args,**kwargs):
        start=start+end
        end=start-end
        start=start-end
        super().__init__(start=start,end=end,*args,**kwargs)

and in def insert_tip_anchor(self):

        prev_end = self.get_start()
        arc_len = self.get_arc_length()
        tip_len = self.get_stroke_width() * self.width_to_tip_len * self.tip_width_ratio
        if tip_len >= self.max_tip_length_to_length_ratio * arc_len:    #得到max_tip_len
            alpha = self.max_tip_length_to_length_ratio 
        else:
            alpha = tip_len / arc_len
        self.pointwise_become_partial(self, 1-alpha, 1)
        self.add_line_to(prev_end)
        return self