Dashboard fails to load with error "Uncaught TypeError: Cannot read property 'left' of null" appears in the browser console

Summary

Sometimes when a user tries to view their dashboards, the dashboard is empty without any configured gadgets displayed.

Environment

• Happens more frequently in Chrome and IE 11

Steps to reproduce

1. Create a long list of dashboards with couple of gadgets on each dashboard.
2. Go to the Dashboard page, click on one of the dashboards from the list on the left panel.
3. Scroll on the mouse while the dashboard is loading.

Expected result

The selected dashboard and its gadgets will load properly.

Actual result

• The selected dashboard is empty without any gadgets loaded, only the dashboard title and 3 functionality buttons (Add Gadget, Edit Layout, Tools) are displayed.
• Error Uncaught TypeError: Cannot read property 'left' of null is observed in the Browser Console

Notes

• Clearing browser cache helps to bring back the dashboard with all gadgets temporarily