Bedrock: empty content for certain prompts with max_tokens 1

[dandv]

import AnthropicBedrock from '@anthropic-ai/bedrock-sdk';

const client = new AnthropicBedrock();

async function main(prompt) {
  const message = await client.messages.create({
    max_tokens: 1,
    stream: false,
    messages: [{role: 'user', content: prompt}],
    model: 'anthropic.claude-3-sonnet-20240229-v1:0',
  });
  console.log('Response content: ', message.content);
}

await main('Explain quantum mechanics to a five year old');  // []  <-- ERROR
await main('Translate Hello into French and Spanish');  //  [ { type: 'text', text: 'Here' } ]