[v6/7 Schematic][Fixed] Net Class Flags not saved

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [1.6.3] - UNRELEASED
+### Fixed
+- Net Class Flags not saved in variants or annotated schematics
 
 ## [1.6.2] - 2023-04-24
 ### Added

kibot/kicad/v6_sch.py

@@ -1816,6 +1816,8 @@ class SchematicV6(Schematic):
             _add_items(self.glabels, sch)
             # Hierarchical Labels
             _add_items(self.hlabels, sch)
+            # Net Class Flags
+            _add_items(self.net_class_flags, sch)
             # Symbols
             _add_items(self.symbols, sch, sep=True, cross=cross)
             # Sheets