I opened a focused Matter firmware/spec question here rather than burying the details in this already-large thread:
Short version: VTM31-SN 1.1.5 honors EventPathIB.IsUrgent for 0x003B events, but non-urgent subscriptions can delay generated Generic Switch events until max interval. I’m asking whether Device Library R1.4 §6.6.4.1 implies urgent-equivalent reporting for Generic Switch endpoints.