In the Spectrum 10.4.2 system, I edited the start time of a discovery schedule to start at 3:30 am from the original 2:30am.
The schedule started at 2:30am NOT 3:30am.
Release : 20.2
Component : Spectrum Core / SpectroSERVER
Performance and high latencies
This will update once the SpectroSERVER is able to catch up. Can take a while if the SS is busy.
If the issue continues to be seen after periods of time - please contact support.