How to reproduce:
1. Open the attached “Input.zip” project
2. Open the “SampleScene” Scene (Assets > Scenes > SampleScene)
3. In the Hierarchy window, select “GameObject” GameObject
4. In the Inspector window, find the “Text” input field and insert "\n"
5. Observe the result

Expected result: "\n" is inserted in the input field
Actual result: a new line is inserted in the input field

Reproducible with: 2022.2.0a9, 2022.2.20f1, 2023.1.0a5
Not reproducible with: 2020.3.48f1, 2021.3.25f1, 2022.2.0a8, 2023.1.0b17, 2023.2.0a15
Fixed in: 2023.1.0a6

Reproduced on: macOS 13.2.1 (Intel)

Notes:
Reproducible with “\n”, “\t”, “\r” and “\\”
Also reproducible in the Memory Profiler search bar