Okay, it is still not formatted properly. The key to press to properly format your code is right on top of Tab on your keyboard. You should a single back tick for inline and triple for a code block. See this
But nevertheless, do you have facet integrals in your variational form? If not, what is the reason for turning on the shared_facet mode?
I’ve never had problems with Lagrange elements in parallel, but I do remember having issues with non-conforming CR elements, see Running `CR` in parallel: Error detected in HDF5
I am not on my workstation but can check this and let you know