Unable to set subtitle when BGContinuedProcessingTask expires

Hi,

I've now identified a few areas when BGContinuedProcessingTask gets expired by the system

  1. no progress for ~30 seconds
  2. high CPU usage
  3. high temperature

Some of these I can preempt and expire preemptively and handle the notification, others I cannot and just need to let the failure bubble up.

When the failure does bubble up, I'd like to update the title and subtitle. I'm able to update the title, but the subtitle is fixed at "Task Failed"

Is there any workaround? Or shall I file a bug here?

Unable to set subtitle when BGContinuedProcessingTask expires
 
 
Q