Second data writing failed

[blockdev723]

To write data, the first calling write function is working well.
but if call it again to write second data, it is failed.
Solidity contract:

mapping(address => uint256) public transactionCount;
mapping( address => mapping(uint256 => uint256)) public timestamps;
mapping( address => mapping(uint256 => string)) public txTypes;
mapping( address => mapping(uint256 => string)) public txDatas;

function writeTransaction(uint256 _timestamp, string memory _txType, string memory _txData) public returns(uint256){
    
    timestamps[msg.sender][transactionCount[msg.sender]] = _timestamp;
    txTypes[msg.sender][transactionCount[msg.sender]] = _txType;
    txDatas[msg.sender][transactionCount[msg.sender]] = _txData;

    transactionCount[msg.sender] ++;

    emit WriteTransaction(msg.sender);

    return transactionCount[msg.sender];
}

---

deploy contract and call "write" function:

const writeTx = await contract.writeTransaction('1000000000000000000', 'TestTx', 'tx data');
!!!!!!!!!!! success

try {
    await sleep(60000);
    const writeTx1 = await contract.writeTransaction('1000000000000000000', 'TestTx', 'tx data');
} catch (e) {
    console.log('e => ', e);
    //????????????? failed always        
}

Error content:

e =>  TransactionError: Program failed to complete
    at parseTransactionError (/Users/admin/Documents/workspace/tumulus/tumulus/Contracts/Solana/node_modules/@solana/solidity/lib/logs.js:161:31)
    at /Users/admin/Documents/workspace/tumulus/tumulus/Contracts/Solana/node_modules/@solana/solidity/lib/logs.js:123:27
    at Generator.throw (<anonymous>)
    at rejected (/Users/admin/Documents/workspace/tumulus/tumulus/Contracts/Solana/node_modules/@solana/solidity/lib/logs.js:6:65)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (node:internal/process/task_queues:96:5) {
  logs: [
    'Program 34vt7Bz8tAtVYPUJ6seKZGLgRGWENFNJKgUvreFjo4wt invoke [1]',
    'Program 34vt7Bz8tAtVYPUJ6seKZGLgRGWENFNJKgUvreFjo4wt consumed 1489 of 200000 compute units',
    **'Program failed to complete: Access violation in input section at address 0x47a70e3ca of size 8 by instruction #11821',**

   'Program 34vt7Bz8tAtVYPUJ6seKZGLgRGWENFNJKgUvreFjo4wt failed: Program failed to complete'
  ],
  computeUnitsUsed: 1489

maybe, string type has some problems?