custom widget (nglview) does not work properly

[hainm]

Dear all,

Describe the current behavior
I am getting two views from a Widget model if displaying the view ONCE.

# first cell 
# !pip install nglview
from google.colab import output
output.enable_custom_widget_manager()
from IPython.display import display
import ipywidgets as widgets
import requests
import nglview as nv

view = nv.NGLWidget()
view.add_pdbid('1tsu')
view

# 2nd cell
view._js("console.log(this.model.views)")

Describe the expected behavior
Should get only ONE view of a model
The bug causes some troubles in visualizing the bio molecule:

• Find a tool which can do trajectory visualization in the cloud (e.g. on Colab) and insert it into notebooks MobleyLab/drug-computing#101 (comment)
• Find a tool which can do trajectory visualization in the cloud (e.g. on Colab) and insert it into notebooks MobleyLab/drug-computing#101 (comment)
• Usage questions about nglview: Please ask here first [5] nglviewer/nglview#1002 (comment)

What web browser you are using
Chrome

Additional context
Please see above code

Thank you!

[colaboratory-team]

Tracking internally as b/237702183

[kimjc95]

Colab team, are you aware of this issue?