tqdm.notebook progress bar is not running

I am running a model using tqdm.notebook to check the progress using python3.8. However, the progress bar is not running though the generation works okay.

It just shows this on and on.

Here is my following code, and the model I'm running.

import numpy as np
import tensorflow as tf
from midi_ddsp.utils.midi_synthesis_utils import synthesize_mono_midi, conditioning_df_to_audio
from midi_ddsp.utils.inference_utils import get_process_group
from midi_ddsp.midi_ddsp_synthesize import load_pretrained_model
from midi_ddsp.data_handling.instrument_name_utils import INST_NAME_TO_ID_DICT
from tqdm.notebook import tqdm

# -----MIDI Synthesis-----
midi_file = '/Users/midi-ddsp/midi_example/ode_to_joy.mid'
# Load pre-trained model
synthesis_generator, expression_generator = load_pretrained_model()
# Synthesize with violin:
instrument_name = 'violin'
instrument_id = INST_NAME_TO_ID_DICT[instrument_name]
# Run model prediction
midi_audio, midi_control_params, midi_synth_params, conditioning_df = synthesize_mono_midi(synthesis_generator,
                                                                                           expression_generator,
                                                                                           midi_file, instrument_id,
                                                                                           output_dir=None)

synthesized_audio = midi_audio  # The synthesized audio

conditioning_df_changed = conditioning_df.copy()

idk what's the problem. Hope someone can tell me. I appreciate it!