Anybody using a Canon R with CR3 files? Or alternatively, any problems with export to application?

Since adding the R with CR3 files I have been unable to export ANY file format to ANY application. I am able to export to disk successfully so I have a workaround. I know the CR3 element may be a red-herring (as we say here) but it’s the only change I can think of, other than the new version of PL.
I’ve raised a ticket but we are getting nowhere, so I thought I’d ask the community if you have experienced anything like this.