Contracts' methods always confirmed

[saneery]

What browser and version did you use?

Vivaldi 2.6.1566.40 (Stable channel) (64-bit)

What operating system did you use?

Ubuntu 18.04

Do you have screenshots showing the problem?

What is your issue?

When I call the method stake with amount = 0, then NiftyWallet says that transaction is confirmed, but in reality, it isn't

contract.methods.stake(address, 0).send({
        from: account,
        gas: 400000,
        gasPrice: 1000000000
      })