The error you are encountering likely indicates that the 'split' function is being called during the transaction process and the balance may not be sufficient, even if it appears stable. Checking your coin objects and the methods you're calling, along with the arguments passed, might provide more insights. You might also consider tracking your objects throughout the transaction process to diagnose the issue.

The error 'MoveAbort(MoveLocation { module: ModuleId { address: [..], name: Identifier("balance") }, function: 7, instruction: 10, function_name: Some("split") }, 2)' suggests that there might be an issue with the balance not being enough when a split operation is attempted. You may want to ensure all parts of your balance are accounted for in every transaction.

You should definitely check the objects involved in the transactions and monitor their states closely. Also, reviewing the specific transaction details on SuiScan could provide additional clues.