a strange bug:submenu all pulled forcible

[RiniceSiberia]

as video

1648722967640.mp4

`

Dropdown

                                        <div class="dropdown-menu">
                                            <div class="dropdown dropright dropdown-submenu">
                                                <button class="dropdown-item dropdown-toggle" type="button" data-toggle="dropdown">Action</button>

                                                <div class="dropdown-menu">
                                                    <button class="dropdown-item" type="button">Sub action</button>

                                                    <div class="dropdown dropright dropdown-submenu">
                                                        <button class="dropdown-item dropdown-toggle" type="button">Another sub action</button>

                                                        <div class="dropdown-menu">
                                                            <button class="dropdown-item" type="button">Sub action</button>
                                                            <button class="dropdown-item" type="button">Another sub action</button>
                                                            <button class="dropdown-item" type="button">Something else here</button>
                                                        </div>
                                                    </div>

                                                    <button class="dropdown-item" type="button">Something else here</button>
                                                    <button class="dropdown-item" type="button" disabled>Disabled action</button>

                                                    <div class="dropdown dropright dropdown-submenu">
                                                        <button class="dropdown-item dropdown-toggle" type="button">Another action</button>

                                                        <div class="dropdown-menu">
                                                            <button class="dropdown-item" type="button">Sub action</button>
                                                            <button class="dropdown-item" type="button">Another sub action</button>
                                                            <button class="dropdown-item" type="button">Something else here</button>
                                                        </div>
                                                    </div>
                                                </div>
                                            </div>

                                            <div class="dropdown-header">Dropdown header</div>

                                            <div class="dropdown dropright dropdown-submenu">
                                                <button class="dropdown-item dropdown-toggle" type="button">Another action</button>

                                                <div class="dropdown-menu">
                                                    <button class="dropdown-item" type="button">Sub action</button>
                                                    <button class="dropdown-item" type="button">Another sub action</button>
                                                    <button class="dropdown-item" type="button">Something else here</button>
                                                </div>
                                            </div>

                                            <button class="dropdown-item" type="button">Something else here</button>
                                            <div class="dropdown-divider"></div>
                                            <button class="dropdown-item" type="button">Separated link</button>

                                        </div>
                                    </div>
                                `