JS IPFS couldn't stat a file

Help
1

There is some path I couldn’t get stat of with the next code:

ipfs.files.stat('/ipfs/bafybeiemxf5abjwjbikoz4mc3a3dla6ual3jsgpdr4cjr3oz3evfyavhwq/wiki/index.html')

It seems like it’s a JS IPFS problem, because this file is opening with the official gateway and could be stated by Infura API.

In the same time I can stat other folders and files from this hash:

ipfs.files.stat('/ipfs/bafybeiemxf5abjwjbikoz4mc3a3dla6ual3jsgpdr4cjr3oz3evfyavhwq/wiki')

Details

Stat call result for ‘/ipfs/bafybeiemxf5abjwjbikoz4mc3a3dla6ual3jsgpdr4cjr3oz3evfyavhwq/’:

{
  hostname: 'bafybeiemxf5abjwjbikoz4mc3a3dla6ual3jsgpdr4cjr3oz3evfyavhwq',
  stat: {
    size: 0,
    cumulativeSize: 658038834798,
    blocks: 5,
    type: 'hamt-sharded-directory',
    local: undefined,
    sizeLocal: undefined,
    withLocality: false,
    hash: 'bafybeiemxf5abjwjbikoz4mc3a3dla6ual3jsgpdr4cjr3oz3evfyavhwq'
  }
}

Stat call result for /ipfs/bafybeiemxf5abjwjbikoz4mc3a3dla6ual3jsgpdr4cjr3oz3evfyavhwq/wiki:

{
    size: 0,
    cumulativeSize: 613715579624,
    blocks: 256,
    type: 'hamt-sharded-directory',
    local: undefined,
    sizeLocal: undefined,
    withLocality: false,
    hash: 'QmehSxmTPRCr85Xjgzjut6uWQihoTfqg9VVihJ892bmZCp'
}

Questions

If it’s a bug what information should I collect before filing the issue?
If it’s me doing something wrong, what information should I provide to figure this out?