https://github.com/openjdk/jdk/blob/0ee196bef199c3d32c1f88b26eb4333a7ea73c10/src/hotspot/share/classfile/classLoaderExt.cpp#L59-L65

void ClassLoaderExt::append_boot_classpath(ClassPathEntry* new_entry) {
  if (UseSharedSpaces) {
    warning("Sharing is only supported for boot loader classes because bootstrap classpath has been appended");
    FileMapInfo::current_info()->set_has_platform_or_app_classes(false);
  }
  ClassLoader::add_to_boot_append_entries(new_entry);
}

This should be added:

if (DynamicArchive::is_mapped()) {
  FileMapInfo::dynamic_info()->set_has_platform_or_app_classes(false);
}