1Password Mini Not Copying Shown Password

Yes, it is open for investigation and from there it will move onto a fix phase from what I see. I found it weird when I first tried to reproduce the issue you experienced I was unable to do so, but after that one initial attempt I could reproduce it easily. It's certainly a weird issue and one worthy of a fix in my opinion. Hopefully, they can get this one behind us.

Edit: I could be within the first or second phase. The dev team often have ongoing research into issues. It could also be something like one fix must be implemented before this one can be resolved.