I don't believe that is it unfortunately (I have seen that issue before).
The issue is with our custom libraries. In QA, I had version 1.1.0.0 of the solution installed. I updated with version 1.2.0.0, which included a new set of custom JS libraries. The import was successful (no errors and the version number of the solution in
CRM now shows 1.2.0.0).
However, when I access the solution using a browser, I get served 1.1.0.0 libraries AND that is what I see when I open in CRM too.
The JS was correct in the solution file and the import seems to be successful. Where is the new Javascript?