Short-term forks (1-2 blocks) naturally appear on the network from time to time:
2022-06-12 08:31:01 [PrimaryChain] ✨ Imported #167524 (0xc9b1…369b)
2022-06-12 08:31:01 [PrimaryChain] ♻️ Reorg on #167524,0xc9b1…369b to #167524,0x5f0b…7a41, common ancestor #167523,0x5dc5…4682
2022-06-12 08:31:01 [PrimaryChain] ✨ Imported #167524 (0x5f0b…7a41)
If your block ended up on the fork that the network discarded, you won’t get the corresponding reward. Сoins in the current farmnet have no value, and you need only 1 coin to get a reward as an early tester!