Robert Melikyan

Hi Hanno, Hopefully this is a quick one. Any reason why switching from mercurius to IAS15 or WHFast after reloading a simulation may cause a segmentation fault or ipython kernel...

### Describe the bug, what's wrong, and what you expected. While running through the [Pyvista Trame Tutorials](https://tutorial.pyvista.org/tutorial/09_trame/index.html), specifically [Control Scalar Arrays](https://tutorial.pyvista.org/tutorial/09_trame/c_trame_scalars.html) I came across 2 potential bugs or unintended results....