Proxy fails with with message "sender_sol referenced before assignment" if from and to is same address

[s-medvedev]

Symptom: can't transfer NEON to self

STR:
Send NEON through MetaMask to self

Actual result:
Fails with local variable 'sender_sol' referenced before assignment error message

Expected result:
Works correct

Additional info:

console.log({from: this.getNetworkAccount(), to: recipient, value: amount * 1e18, gas: 21000});
await this.ctx.web3.eth.sendTransaction({from: this.getNetworkAccount(), to: recipient, value: amount * 1e18, gas: 21000});

{
  from: '0x314dF55775e0b6F2B0c6d07C7Ec83a3e1cdC165e',
  to: '0x314dF55775e0b6F2B0c6d07C7Ec83a3e1cdC165e',
  value: 1000000000000000000,
  gas: 21000
}

Proxy Error: Error: local variable 'sender_sol' referenced before assignment
    at /app/node_modules/@trufflesuite/web3-provider-engine/subproviders/provider.js:18:36
    at XMLHttpRequest.request.onreadystatechange (/app/node_modules/web3-providers-http/lib/index.js:98:13)

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