'Nintex Workflow Schedular' Timer Job

Why does the Nintex Workflow Schedular timer job keep getting removed from my SharePoint SE farm?  It seems that after evey install of the monthly SharePoint SE CU, the Nintex Workflow Schedular timer job is no longer in the list of farm timer jobs.  I have to run the command “NWAdmin.exe -o InstallTimerJob -job ScheduledWorkflows -url https://someurl.com” for each web app for it to appear in the timer job list.    Why am I having to add it back to the environment every month or every so often?  When is this job initially created by Nintex?  Why does it keep dissappearing?