macOS NSProgressIndicator Flickers on scroll of below WebView - Really weird behaviour

[gwelmarten]

Hi

I have an NSProgressIndicator along the top of my application, partially over the top of a WebView. When the WebView is scrolled, the NSProgressIndicator can get dragged along with it, until the WebView next refreshes and the NSProgressIndicator is hidden and re-shown again. Screenshot:

[attached - couldn't figure out how to embed upload]

I tried disabling 'Can Draw Concurrently' in IB, and set

[loadingProgressBarUnderUrlBar setUsesThreadedAnimation:NO];

but no luck. Still that split up dragged NSProgressIndicator.

Any ideas on what is causing this and on how to fix it?

Thanks,

Sam

Thanks for your help in advance,