Incorrect sizing and selection when moving columns in QTableView (QAbstractTableModel) using beginMoveColumns

from PyQt5 import QtWidgets, QtCore, QtGui
import sys
from PyQt5.QtCore import QModelIndex, Qt


class MyTableModel(QtCore.QAbstractTableModel):
    def __init__(self, data=[[]], parent=None):
        super().__init__(parent)
        self.data = data

    def headerData(self, section: int, orientation: Qt.Orientation, role: int):
        if role == QtCore.Qt.DisplayRole:
            return "Header"

    def columnCount(self, parent=None):
        return len(self.data[0])

    def rowCount(self, parent=None):
        return len(self.data)

    def data(self, index: QModelIndex, role: int):
        if role == QtCore.Qt.DisplayRole:
            row = index.row()
            col = index.column()
            return str(self.data[row][col])

    def move_column(self, ix, new_ix):
        parent = QtCore.QModelIndex()
        if new_ix > ix:
            target = new_ix + 1
        else:
            target = new_ix
        self.beginMoveColumns(parent, ix, ix, parent, target)

        # Shift column in each row
        for row in self.data:
            row.insert(new_ix, row.pop(ix))

        self.endMoveColumns()

    def move_row(self, ix, new_ix):
        parent = QtCore.QModelIndex()
        if new_ix > ix:
            target = new_ix + 1
        else:
            target = new_ix
        self.beginMoveRows(parent, ix, ix, parent, target)

        # Shift row
        self.data.insert(new_ix, self.data.pop(ix))

        self.endMoveRows()


if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)

    data = []
    for i in range(12):
        row = []
        data.append(row)
        for j in range(6):
            row.append(f"R{i}_C{j}")

    model = MyTableModel(data)
    view = QtWidgets.QTableView()
    view.setModel(model)

    view.setColumnWidth(0, 50)
    view.setColumnWidth(1, 100)

    view.setRowHeight(0, 50)
    view.setRowHeight(1, 100)

    container = QtWidgets.QWidget()
    layout = QtWidgets.QVBoxLayout()
    container.setLayout(layout)

    layout.addWidget(view)

    button = QtWidgets.QPushButton("Move 1st column right by 1")
    button.clicked.connect(lambda: model.move_column(0, 1))
    layout.addWidget(button)

    button = QtWidgets.QPushButton("Move 1st column right by 2")
    button.clicked.connect(lambda: model.move_column(0, 2))
    layout.addWidget(button)

    button = QtWidgets.QPushButton("Move 1st row down by 1")
    button.clicked.connect(lambda: model.move_row(0, 1))
    layout.addWidget(button)

    button = QtWidgets.QPushButton("Move 1st row down by 2")
    button.clicked.connect(lambda: model.move_row(0, 2))
    layout.addWidget(button)

    container.resize(800, 800)
    container.show()


    sys.exit(app.exec_())