Xcode 11.4 installed this morning after updating to 10.15.4.
now when I try and drag a button onto a tabView item Xcode spikes CPU usage to over 100%; the UI feedback in Xcode is VERY slow and the normal 'insertion mark' on the left in the view hierarchy just bounces around and never stabilizes to indicate the drop location.
I have spent nearly an hour trying to place a button on a tabView!!
I have restarted the machine and switched pointing devices.
Does anyone have any suggestions?