You won't see a free chlorine number as most of the product is copper sulphate and a persulphate mix (MPS) so no CYA is required.
Any chance of a picture? I played around with ionisers for a few years ( 6-7) by way of investigation of something I saw heavily criticised in the industry and got a right ear bashing from Waterbear. I did have regular lab tests done on water sample and I was surprised that the results were as good as they were.
I used to run the pool at around 0.6ppm copper (there was also silver present) but what I learned is the ionised version of copper may measure 0.6ppm but there was a total copper level to and by the end that was up to 4ppm but no staining and no cases of green hair, throughout the experiment the pH was always towards 7.0-7.2.

What has always intrigued me is why some owners report staining issues very early on in the usage but that has always as far as I can be reasonably sure from copper sulphate based products and not from ionised versions.

I had quite a few discussions with Chemgeek over the years and when all is said and done there is a risk using copper based products that effects some pools and the extra cost of ionisers in my case or Pristine blue just doesn't seem worth it.

As to the release agent coming out of the liner, well that's a new one on me.