Highlighted Content Web Part - Issues filtering items with Managed Properties

Would someone please be able to explain why I can't get the "Highlighted Content" web part to accurately filter and display files based on the custom fields I've picked? 

Context:  I have a library of PowerPoint files sitting in my department's SharePoint site (we'll call it "Site A") that I want to share on our Sales department's SharePoint site ("Site B").   This setup will allow me to update the files regularly, while only giving the sales staff READ permissions.

In Site A's document library, I've added two custom fields:

• CourseStatus - a "Yes/No" field that controls whether or not a file can be viewed by the sales staff.
• CourseNames - a text field that includes the names of apps that each course covers (i.e.: SharePoint, Teams, Planner, etc.). 

Both fields have been indexed.

On Site B, I've created a page that is supposed to use the "highlighted contents" web part to display the PowerPoint files from Site A.  While displaying the files was easy enough, using the "Managed Properties" to filter based on those custom properties has not been.

Here are the problems I've come across when using the custom fields as filters:

1. "CourseStatusOWSBOOL" is set so only courses with a "Yes/1" value is displayed.  However, if I modify that value back to "No/0", that change is not reflected on this SharePoint page - even after over 24 hours
   
   
2. "M365AppNamesOWSTEXT" is used to filter courses by name.  However, this field doesn't seem to work as intended and I'm not sure what I'm doing wrong.   I originally tried this with a "Choice" column type but with the same or worse results.

I will note that if the "Highlighted Content" web part works as expected on Site A (where I did my initial tests).  So I suspect that I don't fully understand how the "Managed Properties" works and need to know if I'm barking up the wrong tree.