The recently added "Copy Card Number" feature is difficult to use - it worked better before
Previously you could double-click the card number and press Ctrl+C to quickly copy it to the clipboard. It took less than a second and you'd get a simple card number such as TC1234.
Now when clicking the card number, a new "Copy Card Number" pop-up appears. It can take up to 5 seconds to load, and the simplest / shortest option includes a leading "#" prefix followed by a space, e.g. # TC1234.
It's personal preference, but TC1234 without the "#" prefix is more useful and works better as a simple identifier.
The previous behavior was much faster and more convenient for quick keyboard-based workflows.