Tokens sent to a wallet's sub-account shown in "Portfolio" tab

Hello,
I’ve recently made a transaction from CoinEx to a sub-account of my solflare’s main wallet created for SLIM token. The thing is that from my main wallet I can’t access to it, and in the explorer, the tokens appear in “Portfolio” tab, indicating that my wallet’s address is the owner of the account. I can’t understand why I can’t have access to it, to me, it’s a developer’s issue that needs to be fixed or it’s me that still haven’t find the way to get access to it. I would appreciate your help, thank you.

Solflare wallet: