HMEventTrigger doesn't restore all characteristic values when using an end event

Number:rdar://37703334 Date Originated:2018-02-20
Status:Open Resolved:
Product:HomeKit Product Version:
Classification:Other Bug Reproducible:Always
# Summary
HMEventTrigger should restore characteristic states previous to the executed scene. Currently only some characteristic values are restored – for example the power state of a light bulb.

# Steps to reproduce
1. Create an HMEventTrigger and add an event
2. Add a scene to the trigger which sets the power state of a light bulb to On and the brightness to 100%.
3. Set an HMDurationEvent as end event.
4. Trigger the trigger and wait until the end event restores the characteristic values before the trigger was executed.

# Expected Results
The power state and brightness value should be restored to the previous value.

# Actual Result
Only the power state is restored.

# Comment
If this is expected behaviour, please update the documentation of `HMEventTrigger.endEvents` accordingly.

Tested on iOS 11.3 (15E5178f)


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