Same horrible thing was happening on my iPhone 11. A colored, rounded-off rectangular box was encircling whatever IT deemed the most important info on the page. The words “back”, “return”, “select”. The top row of the passcode keypad! Any message I’d type. It obscured other parts of the page, was bi-colored and it also TICKED! It was driving me CRAZY. Particularly when the “Geniuses” at support thought I was crazy. Had me on the phone for over TWO HOURS and… no joy. THEN, I did some Googling, arrived here, and I saw, suggested above, that touching the home button three times might fix it. iPhone 11. No home button. . So, instead, I pushed in the main, right side control bar three times and… THE RECTANGLE DISAPPEARED! POOF! GONE! It had something to do with VO, or guided access, but WHATEVER! And, NO ONE at Apple had ever even HEARD of this whole thing! Pathetic. But, I am so happy now! No more rectangles and no more ticking! Thanks!