When I open Bridge, I notice that the thumbs are always rebuilding ?? And that takes time

Hello Guys,

This is driving me nuts..Each time I open adobe bridge I see that the thumbs need rebuilding. That starts by itself but it takes time....

Is there a setting I do not know of so the cached images are saved?

[Moved from the Lounge (which is where you can "connect with your peers" from across all of Adobe's products for conversations that don't directly relate to help and support) to a product-specific support forum - moderator]