fix missing nhs update

Author: LasNikas

src/schemes/boundary/open_boundary/system.jl

@@ -309,6 +309,13 @@ function check_domain!(system, v, u, v_ode, u_ode, semi)
     update_system_buffer!(system.buffer, semi)
     update_system_buffer!(fluid_system.buffer, semi)
 
+    # Since particles have been transferred, the neighborhood searches must be updated
+    nhs_fluid_boundary = get_neighborhood_search(fluid_system, system, semi)
+    nhs_boundary_fluid = get_neighborhood_search(system, fluid_system, semi)
+
+    update_nhs!(nhs_fluid_boundary, fluid_system, system, u, u_fluid, semi)
+    update_nhs!(nhs_boundary_fluid, system, fluid_system, u_fluid, u, semi)
+
     return system
 end