[Bug] subjectMetadata doesn't return the active Tab metaData

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This is an inconsistent behaviour, but if I try to get the subjectMetaData for a dapp, the selector doesn't return the dapp until I refresh the page. This behaviour is not consistent, most of the times the metaData for the current tab is there. It's quite random

### Manual Steps:
1. Close all the browser windows
2. Go to https://pancakeswap.finance/ or any dapp in a fresh window which is not connected to the extension and start the extension
3. You might need to restart the browser again to replicate this bug

### Screenshots

[Private Zenhub Video](https://api.zenhub.com/attachedFiles/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBBKzFkQkE9PSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--d7630c36e5eab424f88f43cf5b3b65a8fefdf356/Screen%20Recording%202024-04-15%20at%203.45.32%E2%80%AFPM.mov)

### Background console for the send-metaData,

https://github.com/MetaMask/metamask-extension/assets/39872794/96db0519-a805-4587-a9b8-ffd748ea9dde

Start by tracing the subjectMetadata selector and the send-metaData flow described in the issue, reproducing the fresh-browser startup steps with a dapp such as pancakeswap.finance. Determine why the active tab's metadata is sometimes absent, then verify that the selector consistently returns it without requiring a page refresh.

Written by the indexing model from the issue text.