Chrome Version       : 50.0.2661.94 m (64-bit)
URLs (if applicable) : http://www.pandora.com/

What steps will reproduce the problem?
(1) Clear all caches and cookies.
(2) Set "Let me choose when to run plugin content"
(3) Attempt to log in to Pandora.

What is the expected result?

With www.pandora.com as a whitelisted plugins exception, I expect all plugins to run without problems.

What happens instead?

The Pandora login throws a timeout error and won't work unless I change the Chrome configuration to "Detect and run important plugin content."

This is undesirable because I still want to use a whitelist only.

Note that after a successful login, the Pandora player works normally even with resetting the "Let me choose when to run plugin content" configuration.