Unwanted application root clone appeared in my database

Oracle 19.3, RHEL7.

I'm testing new features. Created the following:

testcdb1,testcdb2

In testcdb1 I have:

Application Container - approot

Approot has a database link to Approot2 in testcdb2 (no longer needed now the proxy is created)

In Approot's application Myapp, I have a single table JUNK, w/one text colum. DATA=SHARED

Application pdb - apppdb1

Proxy Pdb - proxypdb - points to approot2 in testcdb2 (approot2 is replicating the myapp app created in apppdb1)

In test cdb2

Application container approot2

Application pdb - apppdb2

When I initially synced the app, everything worked as advertised, though I thought after I could sync the app and data inserted into one would show up in the other. Not so.