Logic X Compressor VU Meter Not Working...

This is a known intermittent graphics bug from a few years ago. I don't know what macOS/Logic version you are using and if it has been solved in the meantime.

Possible solutions are to save the COmpressor preset, remove it, and put it back onto the Channel Strip. Or restart Logic (which is more annoying).

Do you have other Plugins on the Channel Strip that might affect the proper behavior of the COmpressor?

tsunchoo wrote:

This happens every now and again and has been happening for at least a year and still is, despite several updates. I don't wanna have to trash preferences to fix it, why's it not been fixed yet?

What do you mean by "not working". This is a really broad description.

Is it not showing up, does it distort the signal, is the UI not responding, etc?