I have a PC and a Phone both with the latest build of Windows 10 (Stable, not insider) and all of the apps are up to date (updated yesterday to most up to date versions).

If I set up a time\date based reminder using Cortana on my phone it appears as an entry in my calendar on my phone, but it does not appear in the calendar on my PC.

I'm logged in using the same Microsoft account, and and calendar entry that I set up directly in the calendar syncs perfectly (both ways). The problem seems to be limited to reminders set up in Cortana.

Any ideas on how I can fix this?