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

[bmalepaty]

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