My Token Standard/Custom Objects do not load
We are observing this issue when creating My Tokens for some of our customers.
The Standard & custom objects on the right panel fail to load
The right panel looks like the screenshot below.

We tried with different browsers, with mixed results. With chrome, clicking on + does not open the object hierarchy..
With IE, part of the objects load, but the browser becomes unresponsive and crashes after 2-3 minutes.
This problem is occurring only for those customers with large number of custom objects.
If anyone has encountered similar issues and found any work-around, really appreciate if you can post it here.
Thanks in advance for your input.