More tests

Author: RemiLehe

openpmd_viewer/openpmd_timeseries/interactive.py

@@ -528,6 +528,7 @@ def step_bw(b):
             display(container_fld)
         elif self.avail_fields is None:
             display(container_ptcl)
+            display(container_ptcl)
 """
         # When using %matplotlib widget, display the figures at the end
         if matplotlib.get_backend() in ['ipympl', 'widget', 'module://ipympl.backend_nbagg']: