Capture One 22 is not displaying Captured Images from tethered Canon 5DS camera

I have been using Capture One on our focus-stacking imaging system since 2015. Capture One 22 continues to give me problems but the latest one is most perplexing and frustrating.
I take images and they just dont show up in Capture one. I can find them in the correct capture folder in Windows but it's as if they don't exist to Capture One.
If we roll back to Capture One 21 everything operates as normal but ever since  build 15.3.0 this problem makes the program virtually useless to me. This morning I rolled back to build 15.2.1, which had worked fine but this time in a stack of 355 images of part of a tiny bug, the first 50 or so were showing up but the remainder disappeared. After the stack was complete I was able to import the images from the originals folder in the catalogue, process and export them as TIFFs. I eventually ended up with a beautiful focus-stacked image but this convuluted work flow should not be necessary.

I have an AMD Ryzen Threadripper 3990X 64-Core Processor 2.90 GHz, 128GB RAM, a 3090GPU and 2X 2TB Samsung SSDs running on Windows 10. 
Has anyone else experienced this problem?
Thanks,
Geoff