Hi @Matt_L
SQ4You is remote control for a single mix on the console, so it is possible that channels on the SQ itself could have been turned up.
This would be easiest to check on the console by just jumping through the mixes and seeing if any particular input (or mix master) has been turned up – or if processing has been applied e.g. turning up all bands on a GEQ.
The fact that you say ‘everyone’s in ears’ though would point toward something else, unless everyone is on the same mix?
Or if people had control over the wrong mixes – meaning they might be trying to turn up their own mix, but were all turning up other people’s!
If you check all this and don’t spot anything though, please contact us with more details on the setup and a zipped copy of the show folder using https://support.allen-heath.com
Thanks!
Keith.