Implementation file of a view controller demonstrating the issue here: https://stackoverflow.com/q/75807047/412107

HebrewAndEnglishTester

//
//  ViewController.m
//  HebrewNoteTester
//
//  Created by Tom Hamming on 3/21/23.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    NSString *text = (NSString *)[[NSUserDefaults standardUserDefaults] objectForKey:@"textContent"];
    if (text)
        self.textView.text = text;
}

-(void)textViewDidChange:(UITextView *)textView
{
    [[NSUserDefaults standardUserDefaults] setObject:self.textView.text forKey:@"textContent"];
}

@end