Why the getTransactions doesn't return data of jetton transfer

[VetchM]

This address UQBcUOVngVSHr4dmf2hFa4u4pFm7b4wji5ZBTE1A8C0hi5iQ had two USDT transfer that happened before it's first TON transfer.

But the getTransactions API only return data that happens after the firtst TON transfer, and ignore the initial two, is this behavior intended? Is there a way to obtain those lost transfer data?

curl -X 'GET' \
  'https://toncenter.com/api/v2/getTransactions?address=UQBcUOVngVSHr4dmf2hFa4u4pFm7b4wji5ZBTE1A8C0hi5iQ&limit=100&to_lt=0&archival=true' \
  -H 'accept: application/json'