Xcode 10.1 missing symbolication for UI test crashes

I have an iOS hardware device (iPhone 8) running iOS 12.0.1
It is set to run UI tests along with a set of Simulators (iOS 10.x, 11.x and 12.x)
The hardware device is crashing during UI tests sometimes, but the crash log is not symbolicated.
This wasn't a problem before, but I honestly don't know if it started with Xcode 10.0 or Xcode 10.1

Is there a new flag or setting somewhere I'm overlooking, or is this just broken?