I tested the latest Orion RC with the frameworks from the last Orion Beta and it fixed the refresh/reload issue I have under Catalina. I remembered something I read on the WebKit site and used DYLD_FRAMEWORK_PATH to use the WebKit and other frameworks from the Dec 14 Beta (i.e. WebKit 618.1.2 along with WebCore and other supporting frameworks) with the latest. While I am sure there are drawbacks to mixing and matching applications and frameworks this way, I figured it might be a quick way to distinguish the issue to the main application or one of the frameworks (e.g. WebKit).
If I set and export DYLD_FRAMEWORK_PATH to the last Orion Beta/Contents/Frameworks in Terminal and then run the latest Orion RC, it passes all my tests cases. If I then unset DYLD_FRAMEWORK_PATH and then run Orion RC, I am back to the refresh/reload issue.