Yes, I have seen the issue before with other plug-ins (ex- sql), I remember going to the 'Windows Task Scheduler', to fix it. But, for SCV I think all jobs are created as cron jobs on the SCV appliance.
Could you check this kb, this might be an issue.
SCV scheduled jobs do not trigger at all:
https://kb.netapp.com/mgmt/SnapCenter/SCV_scheduled_jobs_do_not_trigger_at_all