Neons showing black \& Lighting is not visible

I’ve problems with the Neons and lighting. Some kind of bug. Version 2.1. Neons are black and lighting isnt showing. Dont understand because it was good for the last 2 weeks. It is in all my files.

Hadn’t seen this one, had to check for myself, it looks like the nit slider in the latest version has had it’s range tweaked/extended. Sliding it way up seems to help and it can be fine tuned from there.