The logic has now been updated from the TRX team. Your TRX reward would now be transferred to your wallet if you have claimed 10TRX rewards at once. Or else, the TRX would get accumulated for 7 days. After 7 days, regardless of the TRX accumulated, you will get the reward in your TRX wallet.

For example: If you claim 7 TRX worth rewards right now, it would not get transferred to you instantly. Instead, the would start accumulating on the backend. Once the accumulated reward reaches 10TRX, it will be transferred to your wallet.

Suppose, you are not able to accumulate 10TRX for whatever reason. In this case, even if you have accumulated 1 TRX, it will be transferred to your wallet after 7 days. I hope this makes it clear.