Hey alac,
Are you running Internet Explorer? I think it sounds like you're running into an issue with IE where it can't display partial cards. If you try a browser like Chrome or Firefox, is the issue you're talking about fixed?
it's clear that Flash (Legacy) should be default.
The problem with Flash is that it's blocked by all browsers by default these days. And the steps to unblock it are complicated and hard to follow for non-technical users.