False result when finding bounding boxes for lines in blocks. about pymupdf HOT 6 CLOSED

import matplotlib.pyplot as plt
import fitz

#auxilliary function to plot closed polygon
def plot_poly(x1, y1, x2, y2, color = 'k', linewidth = 1):
    plt.plot(
        [x1, x2, x2, x1, x1], #four x vertices and closed
        [y1, y1, y2, y2, y1], #four y vertices and closed
        color = color,
        linewidth = linewidth
    )


pdf_file = "North 02_Minieh_Record 01.pdf"

with fitz.open(pdf_file) as doc:
    for page in doc:        
        dic = page.get_text('rawdict')

        #the text
        for block in dic['blocks']:
           
            if block['type'] == 0: #Text type
                for line in block['lines']:

                    X1, Y1, X2, Y2 = line['bbox'] #bbox of each line
                    #plot_poly(X1, Y1, X2, Y2, color = 'r') #no need for it now as previous code

                    ''' #irrelevant for code now
                    if line['dir'][1] == -1: #Rotated text
                        angle = 90
                    else: #Normal text orientation
                        angle = 0
                    '''

                    for span in line['spans']:
                        ascender = span['ascender']
                        descender = span['descender']
                        size = span['size']
                        font = span['font']
                        #text = span['text']

                        x0, y0 = span['origin']
                        plt.plot(x0, y0,'o', markersize = 1, color = 'b') #origin x, y of each span
                        
                        spx1, spy1, spx2, spy2 = span['bbox']
                        plot_poly(spx1, spy1, spx2, spy2, color = 'r')

        
        #the layout
        #one can comment this block out, but it is there for better figuring out
        drawings = page.get_drawings()
        for drawing in drawings:
            for item in drawing['items']:
                shape, data, num = item
                Xr1, Yr1, Xr2, Yr2 = data
                width = Xr2 - Xr1
                height = Yr2 - Yr1
                if width > 1 and height < 1:
                    plot_poly(Xr1, Yr1, Xr2, Yr2)
                elif width < 1 and height > 1:
                    plot_poly(Xr1, Yr1, Xr2, Yr2 )
                else:
                    pass
        

ax = plt.gca()
ax.invert_yaxis()
plt.show()