diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index 708fc547de..d445c104ae 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -5825,6 +5825,7 @@ static void NewSpriteGroup(ByteReader *buf)
 			ProcessDeterministicSpriteGroupRanges(ranges, group->ranges, group->default_group);
 
 			OptimiseVarAction2DeterministicSpriteGroup(va2_opt_state, feature, varsize, group, current_adjusts);
+			current_adjusts.clear();
 			break;
 		}
 
diff --git a/src/newgrf_internal.h b/src/newgrf_internal.h
index effc059a70..d9322bc9e7 100644
--- a/src/newgrf_internal.h
+++ b/src/newgrf_internal.h
@@ -129,6 +129,9 @@ public:
 		this->group_temp_store_variable_tracking_storage.EmptyArena();
 		this->procedure_annotations.clear();
 		this->procedure_annotations_storage.EmptyArena();
+		for (auto iter : this->inlinable_adjust_groups) {
+			iter.second->~vector<DeterministicSpriteGroupAdjust>();
+		}
 		this->inlinable_adjust_groups.clear();
 		this->inlinable_adjust_groups_storage.EmptyArena();
 		this->dead_store_elimination_candidates.clear();