I'm running 3.5.5 and have recently encountered a strange behavior in one of my sessions. When inserting a plugin on my vocal bus channel, the level jumps by about 4 dB. It's not something in the plugin as I've tried numerous plugins from various developers and the results are the same. Mix FX are off, and I'm using stereo plugins on a stereo bus.
Has anyone else experienced this? If so, is there a fix?