We have someone testing our JUCE-based plugins in the Big Sur beta, and we’re seeing some graphics issues in all components that do “live” drawing (i.e., updating their displays during timer callbacks). It’s as if the component’s backgrounds aren’t clearing themselves before we draw to the graphic contexts in the paint() functions, so drawing a rubber-banded line, for example, leaves “trails” as you drag.
This only happens in OS 11. I don’t know if it’s code we need to fix, code in JUCE that needs to change, a problem with the DAW(s), or if it’s an inherent problem running our Intel-built plugins under the new OS.
Anyone else seen this?