Textinput disappear in ios if display load once more in react native

if i load display first time then textinput is seen , however when navigate to display once more then textinput is disappear, however the identical factor is working tremendous in android

<TextInput
                  fashion={types.enter}
                  editable={this.state.isLoading == true ? false : true}
                  placeholderTextColor={MyColors.placeHolderColor}
                  worth={this.state.mobileNumber}
                  onChangeText={val => textMobileNumberCheck(val)}
                  placeholder="Enter cellular quantity"
                  keyboardType="numeric"
                  maxLength={10}
                />



const types = StyleSheet.create({
 enter: {
    top: 45,
    backgroundColor: '#fff',
    paddingVertical: 5,
    paddingHorizontal: 12,
    borderColor: '#ccc',
    marginHorizontal: 20,
    marginBottom: 5,
    marginTop: 15,
    colour: '#000',
    marginTop: 15,
    borderWidth: 1,
    borderRadius: 5,
    fontSize: 16,
    marginBottom: 20,
  },
 
});