[New Blog Templates] Slow query for New Blog Templates plugin

New Blog Templates is with a similar problem to Domain Mapping 4.4.3.3 version slow queries (https://premium.wpmudev.org/forums/topic/domain-mapping-query-monitor-plugins-shows-domain-mapping-is-generating-a-slow-query). On Query Monitor plugin shows that it is loading a lot of rows because of this code:

do_action('plugins_loaded')
wp-includes/plugin.php:453
nbt_load_text_domain()
wp-content/plugins/blogtemplates/blogtemplates.php:79
load_plugin_textdomain()
wp-includes/l10n.php:762
determine_locale()
wp-includes/l10n.php:134
get_user_locale()

Executing this db query:

SELECT user_id, meta_key, meta_value
FROM xxxx_usermeta
WHERE user_id IN (1)
ORDER BY umeta_id ASC

That is being executed everywhere, now only in a place where I would need the load_plugin_textdomain() for example. Thank you very much!