Excessive number of RECEIPT_NOT_FOUND errors in NftTransferLoadTest

This is a regression in `main` that is manifested by a drop in TPS, excessive number of `RECEIPT_NOT_FOUND` errors and overall performance instability.
From [client.log](https://perf.analytics.eng.hashgraph.io/ephemeral/test_runs/main_Latitude1_749/report/client.log):
```
06-13 00:24:21:570 [ForkJoinPool-63-worker-6] DEBUG com.hedera.benchmark.WorkingQueue - Receipts: 2200000 TPS(EMA): 13425 TPS(current): 12501 RECEIPT_NOT_FOUND:2035
...
06-13 00:24:27:755 [ForkJoinPool-51-worker-8] DEBUG com.hedera.benchmark.WorkingQueue - Receipts: 2300000 TPS(EMA): 13539 TPS(current): 16168 RECEIPT_NOT_FOUND:2327
...
06-13 06:20:37:767 [main] INFO com.hedera.benchmark.NftTransferLoadTest - Finished NftTransferLoadTest: 227430320 transferred in 21602 sec, TPS: 10528
```
The total number of `RECEIPT_NOT_FOUND` errors is 250K.