ankr_getNFTsByOwner returned wrong data

https://snowtrace.io/token/0xbb4a6aa2629ed6f08c6e95d51f891fa2017f3f0a?a=0x779eeA27e778b43c751A10e442679A933faECfab

In the link above user address 0x779eeA27e778b43c751A10e442679A933faECfab has 0 (zero) NFT of contract 0xbb4a6aa2629ed6f08c6e95d51f891fa2017f3f0a

But when I trying to run ankr_getNFTsByOwner function below I got a list NFT of contract 0xbb4a6aa2629ed6f08c6e95d51f891fa2017f3f0a

=> The correct returned should be emmpty

curl --request POST
--url 'https://rpc.ankr.com/multichain/79258ce7f7ee046decc3b5292a24eb4bf7c910d7e39b691384c7ce0cfb839a01/?ankr_getNFTsByOwner='
--header 'accept: application/json'
--header 'content-type: application/json'
--data '
{
"id": 1,
"jsonrpc": "2.0",
"method": "ankr_getNFTsByOwner",
"params": {
"blockchain": [
"avalanche"
],
"filter": [
{
"0xbb4a6aa2629ed6f08c6e95d51f891fa2017f3f0a": []
}
],
"walletAddress": "0x779eeA27e778b43c751A10e442679A933faECfab"
}
}
'