I’ve already reported this issue through the official Nothing feedback tool after updating to Nothing OS 4.0 (official update).
My lock screen widget keeps freezing, and even
though it still works when I tap it, the color doesn’t change when turning it ON or OFF.
After every restart, the same issue appears again, which makes it more frustrating.
I’ve shared all the details with Nothing so they can check and fix it in the next update.
If anyone else is facing the same issue, please comment - it will help Nothing understand the problem better.