BUG: plugin gui reacts before sound!

I’m still trying to find the way of reproduce this bug…

some plugins as a the UAD 1176 may show the needle movement before the sound, delay compensation is on, so that’s not the problem, i also experienced it with other compressors such as waves c1, or waves api2500, not happening with Steinberg stock compressor…

If i find how to reproduce it ill post it.