Unexpected encoding result

[qwertys318]

Hello!
I do swapExactAmountIn osmosis message. And usually it's working perfect.
But sometimes, for example in DAI/OSMO pool i encode message with parameter:

tokenIn: {
  "denom": "ibc/0CD3A0285E1341859B5E86B6AB7682F023D03E97607CCC1DC95706411D866DF7",
  "amount": "129433920747610326239"
}

But after in osmosis scan in logs I see this:
https://www.mintscan.io/osmosis/txs/C67C13B32A51CBCD6763CA515DDCABD1523281A849D0C445CFF4A8FC5DEE5E52

"token_in":{
"denom":string"ibc/0CD3A0285E1341859B5E86B6AB7682F023D03E97607CCC1DC95706411D866DF7"
"amount":string"306712231643464927"
}

I cannot understand how the 129433920747610326239 become 306712231643464927.
Please, help!

[qwertys318]

the problem is in osmojs library, sorry