Hello,
First, can you make sure you are using the latest version of SplitEQ? You can find the latest installer here: https://www.eventideaudio.com/downloads/?product=SplitEQ
It’d be useful to see the crashlogs from Cubase as well as your system information. Please right-click the Eventide logo in the plug-in window and select “Copy Support Information to Clipboard” and then send that to support@eventide.com, along with any crashlogs from Cubase.
You can also try turning OpenGL off in the plug-in settings and seeing if that improves the issue, but it would still be useful for you to email support with the information above to help us determine what is causing the issue.
