After a lot of digging, I discovered that the transaction was made at 18:42 (while I was home). And since there's no history of nothing I remember I have imported some private keys and I might have used Sweep.
You can't sweep a seed phrase. You can only a sweep private keys. Do you remember exporting any of private keys from your wallet?
If you swept your private key, the fund should have moved to a new wallet and it's normal that it's not displayed in the original wallet.