I think there has been recent changes in Organizational Account (AGOL) of ArcGIS for Personal Use, where ArcGIS Pro licensed through "GIS Professional Advanced" User-type, rather than the Add-On license of ArcGIS Pro. User Types: ArcGIS Online
Recently, I found (in my ArcGIS Online Organizational Account), "GIS Professional Advanced" user-type. Initially I had "Creator" User-type alongwith ArcGIS Pro add-on license (which had expired somehow). Once I unassigned the add-on license (having negative balance), I saw the following message.
Then, I assigned "GIS Professional Advanced" user-type to my named user.
I believe, this gets auto-assigned after sometime. That's why it started working for you without making any changes.
Just to ensure, do you see "GIS Professional Advanced" as your User-Type?
Think Location