Using the default interface i can no longer see shield icon and the boarder around spell casts that are uninterruptable. I used to see this both on my target’s castbar and cast cast on enemy nameplate castbar but it’s gone. I even tried to download quartz to see if this could help but i cannot get this to show. Is there an option or command to disable / re-enable this somehow?
That’s something an addon was doing. It’s not base functionality
It’s part of the default but addons can modify it.
https://github.com/Gethe/wow-ui-source/blob/live/Interface/FrameXML/CastingBarFrame.lua#L254