Insert Issues

I am having a very strange issue that has only started since using 9 the 4th insert is having a backwards effect on the other 3 slots I have Slate VCC on slot 1 and the VU meter is reacting the same as the plugin in insert 4? The plugin in insert 4 is a look ahead breath controller plugin and the VU meter on the VCC is doing the same if I switch off the Breath controller plugin the VU meter will work fine? This tells me that the audio is not streaming through the inserts correct.
Found this out tonight and it’s had my head bashed in trying to work out why.