Learning Plan Mapping Bulk Loader Completed Date - does what?

Summary

Learning Plan Mapping Bulk Loader Completed Date - does what?

Content

I was getting ready to mass assign a list of learning plans. Normally I don't have to do this without using dynamic groups. So, I've not used the learning plan mapping bulk loader before.

After reading the online help, that clearly states if the Completed Date field is left blank the current date will be used, I thought I should test in staging. Since I DON'T want to assign the LP and mark it complete all at once.

In staging I found that leaving the completed date field blank does nothing.