CObblemon:CRZquiz

The bug was in RewardManager.giveRewards() — two issues:

1. transactionId was just the player's UUID (line 32): Since the transaction ID never changed between quizzes, the anti-dupe check at line 45 would permanently block the player after their first win.
2. cleanup() was called only at the end (line 86): When a player got blocked by the transaction check, the method returned early at line 47, so cleanup() was never reached and the stale entry was never removed.

Fix applied:

• Changed transactionId from playerId.toString() to playerId + "-" + System.currentTimeMillis(), making it unique per reward event instead of per player. This way the anti-dupe check only prevents the same reward call from being processed twice simultaneously, without blocking future quizzes.
• Moved cleanup() to the beginning of the method, before any checks, so stale entries are always cleared regardless of early returns.