Slowdown inside QGIS window

[GGDRriedel]

I am using the library to display some loaded profiles in QGIS .

So far so good, but the window slows down EXTREMELY during interaction.

I suspect something about the different loops not interacting correctly but that's where I am out of my league here, here is my basic code:

class GPR3DViewerDialog(QDialog):
    def __init__(self, gpr_data, profile_coords, dz=0.1, parent=None):
        super().__init__(parent)
        self.setWindowTitle("3D GPR Profile Viewer")
        self.resize(1000, 700)

        layout = QVBoxLayout()
        self.plotter = QtInteractor(self)
        layout.addWidget(self.plotter.interactor)
        self.setLayout(layout)

        self.grid = self.create_3d_gpr_surface(gpr_data, profile_coords, dz)
        self.plot_3d_profile()

    def create_3d_gpr_surface(self, gpr_data, profile_coords, dz):
        """Convert 2D GPR data and profile coords into a PyVista StructuredGrid"""
        n_depth, n_traces = gpr_data.shape
        points = []

        for i, coord in enumerate(profile_coords):
            x, y = coord.x(), coord.y()
            for j in range(n_depth):
                z = -j * dz
                points.append([x, y, z])

        points = np.array(points)
        values = gpr_data.flatten(order='F')  # depth major order

        grid = pv.StructuredGrid()
        grid.points = points
        grid.dimensions = [1, n_traces, n_depth]  # (x,y,z)
        grid["amplitude"] = values

        return grid

    def plot_3d_profile(self):
        """Render the 3D grid in the embedded PyVista viewer"""
        self.plotter.clear()
        self.plotter.add_mesh(
            self.grid, 
            scalars="amplitude", 
            cmap="seismic", 
            clim=[-abs(self.grid["amplitude"]).max(), abs(self.grid["amplitude"]).max()],
            show_scalar_bar=True
        )
        self.plotter.reset_camera()
        self.plotter.show_axes()
        
        
        
    #override for propper closing
    def closeEvent(self, event):
        self.plotter.close()
        self.plotter = None
        self.grid = None
        event.accept()

I added the override because otherwise the 3d window would only be hidden in the background and keep running. The grid setup is ok, I get a picture and interactive window.

My suspicion is that wrapping it in an interactive layout is causing some mayhem.
Could somebody more down with this stuff have a look?