проблема с методом page.getpixmap с pumupdf 1.14.12

Question

Новая версия PyMuPdf (1.14.12), похоже, имеет проблемы в приведенном ниже коде (на основе pymupdf doc для Сборника аннотаций части рецептов) сгенерированный pdf-файл верен, сгенерированное изображение неверно: все аннотации с непрозрачностью! = 1. отсутствуют в изображении

# -*- coding: utf-8 -*-
from __future__ import print_function
import sys
print("Python", sys.version, "on", sys.platform, "\n")
import fitz
print(fitz.__doc__, "\n")

text = "text in line\ntext in line\ntext in line\ntext in line"
red    = (1, 0, 0)
blue   = (0, 0, 1)
gold   = (1, 1, 0)
colors = {"stroke": blue, "fill": gold}
colors2 = {"fill": blue, "stroke": gold}
border = {"width": 0.3, "dashes": [2]}
displ = fitz.Rect(0, 50, 0, 50)
r = fitz.Rect(50, 100, 220, 135)
t1 = u"têxt üsès Lätiñ charß,\nEUR: €, mu: µ, super scripts: ²³!"

def print_descr(rect, annot):
    """Print a short description to the right of an annot rect."""
    annot.parent.insertText(rect.br + (10, 0),
                    "'%s' annotation" % annot.type[1], color = red)

def rect_from_quad(q):
    """Create a rect envelopping a quad (= rotated rect)."""
    return fitz.Rect(q[0], q[1]) | q[2] | q[3]

doc = fitz.open()
page = doc.newPage()
annot = page.addFreetextAnnot(r, t1, rotate = 90)
annot.setOpacity(0.3)
annot.setBorder(border)
annot.update(fontsize = 10, border_color=red, fill_color=gold, text_color=blue)

print_descr(annot.rect, annot)
r = annot.rect + displ
print("added 'FreeText'")

annot = page.addTextAnnot(r.tl, t1)
annot.setColors(colors2)
annot.update()
print_descr(annot.rect, annot)
print("added 'Sticky Note'")

pos = annot.rect.tl + displ.tl

# first insert 4 text lines, rotated clockwise by 15 degrees
page.insertText(pos, text, fontsize=11, morph = (pos, fitz.Matrix(-15)))
# now search text to get the quads
rl = page.searchFor("text in line", quads = True)
r0 = rl[0]
r1 = rl[1]
r2 = rl[2]
r3 = rl[3]
annot = page.addHighlightAnnot(r0)
annot.setOpacity(0.3)
# need to convert quad to rect for descriptive text ...
print_descr(rect_from_quad(r0), annot)
print("added 'HighLight'")

annot = page.addStrikeoutAnnot(r1)
annot.setOpacity(0.3)
print_descr(rect_from_quad(r1), annot)
print("added 'StrikeOut'")

annot = page.addUnderlineAnnot(r2)
annot.setOpacity(0.3)
print_descr(rect_from_quad(r2), annot)
print("added 'Underline'")

annot = page.addSquigglyAnnot(r3)
annot.setOpacity(0.3)
print_descr(rect_from_quad(r3), annot)
print("added 'Squiggly'")

r = rect_from_quad(r3) + displ
annot = page.addPolylineAnnot([r.bl, r.tr, r.br, r.tl])
annot.setOpacity(0.3)
annot.setBorder(border)
annot.setColors(colors)
annot.setLineEnds(fitz.ANNOT_LE_Diamond, fitz.ANNOT_LE_Circle)
annot.update()
print_descr(annot.rect, annot)
print("added 'PolyLine'")

r+= displ
annot = page.addPolygonAnnot([r.bl, r.tr, r.br, r.tl])
annot.setOpacity(0.3)
annot.setBorder(border)
annot.setColors(colors)
annot.setLineEnds(fitz.ANNOT_LE_Diamond, fitz.ANNOT_LE_Circle)
annot.update()
print_descr(annot.rect, annot)
print("added 'Polygon'")

r+= displ
annot = page.addLineAnnot(r.tr, r.bl)
annot.setOpacity(0.3)
annot.setBorder(border)
annot.setColors(colors)
annot.setLineEnds(fitz.ANNOT_LE_Diamond, fitz.ANNOT_LE_Circle)
annot.update()
print_descr(annot.rect, annot)
print("added 'Line'")

r+= displ
annot = page.addRectAnnot(r)
annot.setOpacity(0.3)
annot.setBorder(border)
annot.setColors(colors)
annot.update()
print_descr(annot.rect, annot)
print("added 'Square'")

r+= displ
annot = page.addCircleAnnot(r)
annot.setOpacity(0.3)
annot.setBorder(border)
annot.setColors(colors)
annot.update()
print_descr(annot.rect, annot)
print("added 'Circle'")

r+= displ
annot = page.addFileAnnot(r.tl, b"just anything for testing", "testdata.txt")
annot.setOpacity(0.3)
annot.setColors(colors2)
annot.update()
print_descr(annot.rect, annot)
print("added 'FileAttachment'")

r+= displ
annot = page.addStampAnnot(r, stamp = 0)
annot.setColors(colors)
annot.setOpacity(0.5)
annot.update()
print_descr(annot.rect, annot)
print("added 'Stamp'")

pix=page.getPixmap()
pix.writePNG("new-annots.png")
doc.save("new-annots.pdf", expand=255)

ожидаемый результат - это изображение типа 1.13.20 pymupdf