I am not completely sure what is your exact configuration and scenario because you have not provided any details about it. In teh common case, the tooltip does not reload its content as you can see on all our online demos below:
That is why I assume that your case is more specififc. Since you say that you are using and object and also that the problem is reloading, the scenario I could assume that you have is that you have a flash video and it restarts when hovered. However, I build up a test demo based on this assumption and everything worked as expected - I attached my demo for your reference.
Please, examine my demo and if my assumption is correct and only a small modification is needed, let me know what to do in order to reproduce the issue. Otherwise, open a new support ticket and send me a sample, fully runnable reproduction demo along with detailed reproduction steps and explanations of the actual and teh desired result and I will do my best to help.
All the best,
the Telerik team