  Three-dimensional Yang-Mills-Chern-Simons theory has the peculiar property
that its one-form symmetry defects have non-trivial braiding, namely they are
charged under the same symmetry they generate, which is then anomalous. This
poses a few puzzles in describing the corresponding Symmetry TFT in a
four-dimensional bulk. First, the braiding between lines at the boundary seems
to be ill-defined when such lines are pulled into the bulk. Second, the
Symmetry TFT appears to be too trivial to allow for topological boundary
conditions encoding all the different global variants. We show that both of
these puzzles can be solved by including endable (tubular) surfaces in the
class of bulk topological operators one has to consider. In this way, we are
able to reproduce all global variants of the theory, with their symmetries and
their anomalies. We check the validity of our proposal also against a top-down
holographic realization of the same class of theories.
