Steps to reproduce 1. macOS Version 13.0 Beta 2. Open Safari Tech Preview Version 16.0 (18614.1.19.1.5) 3. Open Web Inspector 4. Go to settings gear 5. In general, check Search, Case Sensitive (for example) Expected: white mark on background blue Actual: The box disappears.
Created attachment 460650 [details] Image showing the issue
<rdar://problem/96388100>
This is probably lower level, maybe bug 242153 or some issues that macOS beta had below WebKit.
*** This bug has been marked as a duplicate of bug 242153 ***