Why do I not get the result back from my startActivityForResult?

I have one class LogBeerActivity that extends AppCompatActivity and has these two methods:

public void gotoAddBrewery(View view) {
    String breweryNameEntered = breweryTextView.getText().toString();
    Intent intent = new Intent(this, AddBreweryActivity.class);
    intent.putExtra(Constants.EXTRAS_ID_BREWERY_NAME, breweryNameEntered);
    startActivityForResult(intent, ADD_BREWERY_REQUEST_CODE);
}

and

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    Log.d(TAG_LOG_BEER_ACTIVITY, "Got request result code: " + resultCode);
    super.onActivityResult(requestCode, resultCode, data);
    switch (requestCode)
    {
        case ADD_BREWERY_REQUEST_CODE:
            if (resultCode == RESULT_OK)
            {
                String breweryName = data.getStringExtra(AddBreweryActivity.BREWERY_NAME_CODE);
                breweryTextView.setText(breweryName);
            }
    }
}

The other class AddBreweryActivity also extends AppCompatActivity and it has this method called when its form with user input is submitted:

public void submitBrewery(View view) {
    EditText breweryLocationInput = findViewById(R.id.input_brewery_location);
    EditText breweryCountryInput = findViewById(R.id.input_brewery_country);
    if (breweryNameInput == null || breweryLocationInput == null || breweryCountryInput == null) {
        Log.e(TAG_ADD_BREWERY_ACTIVITY, "One of the inputs is null!");
        return;
    } else {
        String enteredBreweryName = breweryNameInput.getText().toString().trim();
        String enteredBreweryLocation = breweryLocationInput.getText().toString().trim();
        String enteredBreweryCountry = breweryCountryInput.getText().toString().trim();
        Log.d(TAG_ADD_BREWERY_ACTIVITY, "submitBeer clicked. Brewery: " + enteredBreweryName + " from: " + enteredBreweryLocation + " in: " + enteredBreweryCountry);
        if (!enteredBreweryName.isEmpty() && !enteredBreweryLocation.isEmpty() && !enteredBreweryCountry.isEmpty()) {
            NewBrewery newBrewery = new NewBrewery(enteredBreweryName, enteredBreweryLocation, enteredBreweryCountry);
            URL url = HttpHelper.getUrl(Constants.URL_BASE + Constants.URL_BREWERIES_PATH);
            Thread thread = new Thread(() -> {
                try {
                    HttpHelper.makeRequest(url, newBrewery, this);
                } catch (IOException e) {
                    Log.e(TAG_ADD_BREWERY_ACTIVITY, "Error trying to submit new brewery: ", e);
                    return;
                } catch (HttpHelper.UserNotLoggedInException e) {
                    Log.e(TAG_ADD_BREWERY_ACTIVITY, "Error trying to submit new brewery: ", e);
                    return;
                }
            });
            thread.start();
            Intent resultIndent = new Intent();
            resultIndent.putExtra(BREWERY_NAME_CODE, newBrewery.getName());
            setResult(Activity.RESULT_OK, resultIndent);
            finish();
        }
    }
}

However, the onActivityResult method never gets called, even though the flow between the two activities happens as expected.

EDIT: I've made a discovery. If I comment out the lines of code that do the HTTP request to my server (From the line starting with URL url = ... until and including the line starting with thread.start(); then it works. Is it something to do with starting the new thread that messes things up? In fact, it's enough to just comment out the line that reads thread.start(); and it works (except the http request isn't made, of course).

from Why do I not get the result back from my startActivityForResult?