Just upgraded to 12.3. Now every line or two I type, XCode hangs and a colorful spinner appears for 5-10 seconds.
XCode 12.3 color spinner appearing constantly
Same here, only started to happen after 12.3 update.
I have this issue as well. Xcode 12.3 is completely unusable.
Same here, so frustrating and so unnecessary to release software of this quality....