some fixes

Author: niermann999

core/include/traccc/fitting/kalman_filter/kalman_actor.hpp

@@ -212,7 +212,9 @@ struct kalman_actor : detray::actor {
             actor_state.next();
 
             // Flag renavigation of the current candidate
-            navigation.set_high_trust();
+            if (math::fabs(navigation()) > 1.f * unit<float>::um) {
+                navigation.set_high_trust();
+            }
         }
     }
 };

core/include/traccc/fitting/kalman_filter/two_filters_smoother.hpp

@@ -185,7 +185,7 @@ struct two_filters_smoother {
 
         // Calculate backward chi2
         const matrix_type<D, D> R = (I_m - H * K) * V;
-        // assert(matrix::determinant(R) != 0.f);
+        assert(matrix::determinant(R) != 0.f);
         assert(std::isfinite(matrix::determinant(R)));
         const matrix_type<1, 1> chi2 =
             algebra::matrix::transposed_product<true, false>(

device/common/include/traccc/finding/device/impl/propagate_to_next_surface.ipp

@@ -65,7 +65,9 @@ TRACCC_HOST_DEVICE inline void propagate_to_next_surface(
     const bound_track_parameters<> in_par = params.at(param_id);
 
     // Create propagator
-    propagator_t propagator(cfg.propagation);
+    auto alt_prop_cfg{cfg.propagation};
+    alt_prop_cfg.navigation.estimate_scattering_noise = false;
+    propagator_t propagator(alt_prop_cfg);
 
     // Create propagator state
     typename propagator_t::state propagation(in_par, payload.field_data, det);
@@ -91,7 +93,7 @@ TRACCC_HOST_DEVICE inline void propagate_to_next_surface(
         s3};
     // Parameter resetter
     typename detray::detail::tuple_element<4, actor_tuple_type>::type::state s4{
-        cfg.propagation};
+        alt_prop_cfg};
     // Momentum aborter
     typename detray::detail::tuple_element<5, actor_tuple_type>::type::state s5;
     // CKF aborter