My balance dropped right after requesting — is that normal?

Yes, that's expected. The moment you confirm a withdrawal, the amount is reserved and deducted from your available balance and a matching withdrawal transaction is recorded — even though the status is still Pending. This prevents you from accidentally spending or double-withdrawing the same funds while the payout is being processed. If the withdrawal is later Rejected, the full amount is credited straight back to your balance automatically (you'll see a refund/adjustment entry and a notification). If it's Paid, the funds have left the platform to your wallet, so the balance stays reduced.