UIElements throw exceptions when there are ~200 and more symbols

To reproduce:
1. Open the “UIElementsTextException” project
2. Open the UIelementsWindow window (Test → UIelementsWindow)
3. Create a new Scene and open it

Excepted result: No errors occur
Actual result: After the second step occurs error "NullReferenceException: Object reference not set to an instance of an object" and after the third step occurs another error "ArgumentNullException: Value cannot be null."

Reproducible with: 2022.1.0a11, 2022.1.16f1, 2022.2.0b8, 2023.1.0a10
Not reproducible with: 2020.3.39f1, 2021.3.9f1, 2022.1.0a10

Reproduced on: macOS Monterey 12.5.1 (Intel)