Pyqt6 draw double and triple bonds around an atom

Question

I'm trying to draw possible bonds around a selected atom.
I am using cos and sin to find the positions of the possible new atoms in steps of 45° so I get 8 different positions , which works fine. When it comes to actually drawing the double or triple bonds, the bonds at 135° (top left) and 315° (bottom right) are shown as single bond lines, instead of double or triple.

Does anyone have an idea why this bug might occur or how to solve it?

This is a part of my paintEvent function:

# Calculate possible positions for new atoms in 360° around the selected atom
if self.selected_atom is not None:
    potential_positions = self.calc_potential_positions(self.selected_atom)
    for pos in potential_positions:
        # If atoms at position don't overlap, draw the potential bonds and atoms in different colour
        if not self.check_atom_overlap(pos[0], pos[1]):
            if self.bond_order == 2:
                self.draw_double_bond(self.selected_atom.x_coords, self.selected_atom.y_coords, pos[0],
                                      pos[1], False)
            elif self.bond_order == 3:
                self.draw_triple_bond(self.selected_atom.x_coords, self.selected_atom.y_coords,
                                      pos[0], pos[1], False)
            else:
                self.draw_single_bond(self.selected_atom.x_coords, self.selected_atom.y_coords,
                                      pos[0], pos[1], False)
            self.draw_atom_circle(pos[0], pos[1], self.selected_atom.x_coords,
                                  self.selected_atom.y_coords)
            self.draw_atom(pos[0], pos[1], self.element.SYMBOL, True)
            self.draw_center_atom(self.selected_atom.x_coords, self.selected_atom.y_coords,
                                  self.selected_atom.symbol)

@staticmethod
def calc_potential_positions(atom: chem_editor_logic.Atom) -> list[tuple[int, int]]:
    """

    :param atom:
    :return: list of tuples containing x and y coordinates of potential positions for new atoms
    """

    x = atom.x_coords
    y = atom.y_coords
    distance = 40

    # Calculate coordinates for angles in steps of 45 degrees from 0 to 360
    coordinates_list = []
    for angle_degrees in range(0, 360, 45):
        angle_radians = math.radians(angle_degrees)
        new_x = x + distance * math.cos(angle_radians)
        new_y = y + distance * math.sin(angle_radians)
        coordinates_list.append((int(new_x), int(new_y)))

    print(x, y)
    print(coordinates_list)
    return coordinates_list

def draw_single_bond(self, atom1_x: int, atom1_y: int, atom2_x: int, atom2_y: int, actual_bond: bool) -> None:
    painter = QPainter(self)
    pen = QPen()

    # Set colour black
    pen.setColor(QColor(0, 0, 0))
    pen.setWidth(2)

    if not actual_bond:
        # Set colour red
        pen.setColor(QColor(255, 0, 0))
    painter.setPen(pen)

    painter.drawLine(QPoint(atom1_x, atom1_y), QPoint(atom2_x, atom2_y))

def draw_double_bond(self, atom1_x: int, atom1_y: int, atom2_x: int, atom2_y: int, actual_bond: bool) -> None:
    painter = QPainter(self)
    pen = QPen()

    # Set colour black
    pen.setColor(QColor(0, 0, 0))
    pen.setWidth(2)

    if not actual_bond:
        # Set colour red
        pen.setColor(QColor(255, 0, 0))
    painter.setPen(pen)

    # Draw two lines for a double bond
    offset = 3
    painter.drawLine(QPoint(atom1_x - offset, atom1_y - offset),
                     QPoint(atom2_x - offset, atom2_y - offset))
    painter.drawLine(QPoint(atom1_x + offset, atom1_y + offset),
                     QPoint(atom2_x + offset, atom2_y + offset))

def draw_triple_bond(self, atom1_x: int, atom1_y: int, atom2_x: int, atom2_y: int, actual_bond: bool) -> None:
    painter = QPainter(self)
    pen = QPen()

    # Set colour black
    pen.setColor(QColor(0, 0, 0))
    pen.setWidth(2)

    if not actual_bond:
        # Set colour red
        pen.setColor(QColor(255, 0, 0))
    painter.setPen(pen)

    # Draw three lines for a triple bond
    offset = 4
    painter.drawLine(QPoint(atom1_x, atom1_y),
                     QPoint(atom2_x, atom2_y))
    painter.drawLine(QPoint(atom1_x - offset, atom1_y - offset),
                     QPoint(atom2_x - offset, atom2_y - offset))
    painter.drawLine(QPoint(atom1_x + offset, atom1_y + offset),
                     QPoint(atom2_x + offset, atom2_y + offset))

Those are the functions in use here.