XDP with PDF href to website not working after 2019.010.20064.

After the 2019.010.20064 update, I am no longer able open XDP files where the XDP includes a HREF to a website for a PDF file.  An XDP file of something like this:

<?xml version='1.0' encoding='UTF-8'?><?xfa generator='XFA2_4' APIVersion='3.0.11263.0'?><xdp:xdp xmlns:xdp='http://ns.adobe.com/xdp/'><xfa:datasets xmlns:xfa='http://www.xfa.org/schema/xfa-data/1.0/'>

<xfa:data>

... [data here] ...

</xfa:data></xfa:datasets><pdf href='http://someserver/somepdffile.pdf' xmlns='http://ns.adobe.com/xdp/pdf/'><document><chunk></chunk></document></pdf></xdp:xdp>

What happens when this XDP is opened, Adobe Acrobat Pro (or Reader) will open and I get a warning message about "This PDF file is attempting to launch: [URL specified in HREF]".  After I select "Yes", it will open the PDF specified in the href in a new tab in whatever my default browser is instead of loading the form in Adobe and populating it with the data in the <xfa:data> section of the xdp.

I've played around with all the security settings, including disabling/turning off both Protected View and Enhanced Security. 

If I change that href to a local file like this:

href='C:\somedirectory\someform.pdf'

The form will come up in Adobe and populate with the data specified in the <xfa:data> section correctly.

The href pointing to a website was working properly prior to this update.  On one system that has Adobe XI, it is still working properly.  I'm not able to figure out how to downgrade to the previous version to Acrobat to make sure it was 2019.010.20064 that caused this, but I'm almost certain it was working up until this version came out.