Program: 31034
Project: 31034
Buggy source:
public void initialize(@Nullable KeyParameter aesKey){
  DeterministicSeed seed=Main.bitcoin.wallet().getKeyChainSeed();
  if (aesKey == null) {
    if (seed.isEncrypted()) {
      log.info("String_Node_Str");
      Platform.runLater(() -> askForPasswordAndRetry());
      return;
    }
  }
 else {
    this.aesKey=aesKey;
    seed=seed.decrypt(checkNotNull(Main.bitcoin.wallet().getKeyCrypter()),"String_Node_Str",aesKey);
    passwordButton.setText("String_Node_Str");
  }
  Instant creationTime=Instant.ofEpochSecond(seed.getCreationTimeSeconds());
  LocalDate origDate=creationTime.atZone(ZoneId.systemDefault()).toLocalDate();
  datePicker.setValue(origDate);
  final List<String> mnemonicCode=seed.getMnemonicCode();
  checkNotNull(mnemonicCode);
  String origWords=Joiner.on("String_Node_Str").join(mnemonicCode);
  wordsArea.setText(origWords);
  MnemonicCode codec=unchecked(MnemonicCode::new);
  TextFieldValidator validator=new TextFieldValidator(wordsArea,text -> !didThrow(() -> codec.check(Splitter.on(' ').splitToList(text))));
  wordsArea.textProperty().addListener(o -> {
    if (origDate.equals(datePicker.getValue()))     datePicker.setValue(null);
  }
);
  BooleanBinding datePickerIsInvalid=or(datePicker.valueProperty().isNull(),createBooleanBinding(() -> datePicker.getValue().isAfter(LocalDate.now()),datePicker.valueProperty()));
  restoreButton.disableProperty().bind(or(or(not(validator.valid),equal(origWords,wordsArea.textProperty())),datePickerIsInvalid));
  datePickerIsInvalid.addListener((dp,old,cur) -> {
    if (cur) {
      datePicker.getStyleClass().add("String_Node_Str");
    }
 else {
      datePicker.getStyleClass().remove("String_Node_Str");
    }
  }
);
}

Fixed version (ground truth):
public void initialize(@Nullable KeyParameter aesKey){
  DeterministicSeed seed=Main.bitcoin.wallet().getKeyChainSeed();
  if (aesKey == null) {
    if (seed.isEncrypted()) {
      log.info("String_Node_Str");
      Platform.runLater(this::askForPasswordAndRetry);
      return;
    }
  }
 else {
    this.aesKey=aesKey;
    seed=seed.decrypt(checkNotNull(Main.bitcoin.wallet().getKeyCrypter()),"String_Node_Str",aesKey);
    passwordButton.setText("String_Node_Str");
  }
  Instant creationTime=Instant.ofEpochSecond(seed.getCreationTimeSeconds());
  LocalDate origDate=creationTime.atZone(ZoneId.systemDefault()).toLocalDate();
  datePicker.setValue(origDate);
  final List<String> mnemonicCode=seed.getMnemonicCode();
  checkNotNull(mnemonicCode);
  String origWords=Joiner.on("String_Node_Str").join(mnemonicCode);
  wordsArea.setText(origWords);
  MnemonicCode codec=unchecked(MnemonicCode::new);
  TextFieldValidator validator=new TextFieldValidator(wordsArea,text -> !didThrow(() -> codec.check(Splitter.on(' ').splitToList(text))));
  wordsArea.textProperty().addListener(o -> {
    if (origDate.equals(datePicker.getValue()))     datePicker.setValue(null);
  }
);
  BooleanBinding datePickerIsInvalid=or(datePicker.valueProperty().isNull(),createBooleanBinding(() -> datePicker.getValue().isAfter(LocalDate.now()),datePicker.valueProperty()));
  restoreButton.disableProperty().bind(or(or(not(validator.valid),equal(origWords,wordsArea.textProperty())),datePickerIsInvalid));
  datePickerIsInvalid.addListener((dp,old,cur) -> {
    if (cur) {
      datePicker.getStyleClass().add("String_Node_Str");
    }
 else {
      datePicker.getStyleClass().remove("String_Node_Str");
    }
  }
);
}