Rosetta API Response to Calculate Balance of an Account Address at a given BlockHeight is incorrect

@AeonSw4n

Node is synced. Following is the API response for /network/status

But balance at a given height is returning 0 for earlier blocks.
Request: /account/balance
`{"network_identifier": {
"blockchain": "DeSo",
"network": "MAINNET"
},
"account_identifier": {
"address": "BC1YLj1TE7A7RsRwJQkzvqAuMtd44re4QdQ39HNQhrFN3mTQMM5JxRL"
},
"block_identifier": {
"index": 87100
}}`

**Incorrect Response:**
`{
"block_identifier": {
"index": 87100,
"hash": "0000000000001cba466fc7d707c0f2b3779e2a17baa549c05c1e4f2acc5719e4"
},
"balances": [
{
"value": "0",
"currency": {
"symbol": "DESO",
"decimals": 9
}
}
]
}`

These are the latest transactions for the given address:
https://www.openprosper.com/u/Brad_Stephens/transactions
At any block after 82856, balance should be 56470 (https://www.openprosper.com/u/Brad_Stephens#user-section-wallet)

But Response shows balance is 0