Do you mean that you are applying a vault filter to restrict the displayed items to only those contained withing a specific collection (by clicking the “Collection” filter, and then clicking the collection name)? If you are doing something different, please explain. In the browser extension, the only way to “display the collections” is to click the “Collections” filter, which will display a drop-down menu containing all available collections; however, this feature is primarily meant for selecting a specific collection, not for displaying a list of collections.
What exactly are you doing/clicking when you “go back to all”? I don’t understand what you mean by this phrase.
Are you seeing the account login prompt, or the vault unlock prompt? Do you see a button with the text Unlock, or Continue, Unlock with master password? How did you configure your Vault Timeout Action and Vault Timeout Period under Settings > Account Security?
Is the Collection filter still applied when you get to this point?
Posting some screenshots of what you’re seeing (after redacting any sensitive information) may be helpful.