From the manual:
“Spike Detection Range”
Defines a period of time in which sudden changes in the automated parameter are considered to be unwanted spikes. The spikes can be removed using the “Delete Automation Spikes function”. You can set values from 0 to 200 ms.
Where is “Delete Automation Spikes function”. It’s referred to again in Cubase 9 but nowhere to be found. No Key Coms either.