Just tested v1.11.2 and TSL error still exists.
E (23793) MQTT_CLIENT: Certificate bundle feature is not available in IDF version v4.2.2
E (23852) esp-tls-mbedtls: No server verification option set in esp_tls_cfg_t structure. Check esp_tls API reference
E (23853) esp-tls-mbedtls: Failed to set client configurations
E (23859) esp-tls: create_ssl_handle failed
E (23866) esp-tls: Failed to open new connection
E (23869) TRANS_SSL: Failed to open a new connection
E (23875) MQTT_CLIENT: Error transport connect
I (23881) MQTT: [mqtt_task] MQTT_EVENT_ERROR
I (23885) MQTT: [mqtt_task] MQTT_EVENT_DISCONNECTED
BR,
Ossi