1. run kovidgoyal's kitty version 0.21.2 (default in Ubuntu 22.04)
2. run far2l --tty --nodetect
3. open any non-empty text file in editor
4. select any line (Home, Shift+End)
5. press Ctrl+C several times
6. paste clipboard contents in any non-far2l app

This bug is caused by specific OSC52 handling in old versions of kitty.

Workaround. Another workaround is to use TTYX without TTYXi (TTYXi will be disabled on kitty anyway as kitty has it's own advanced keyboard protocol) or specify clipboard handling command line tools manually.

This bug is not reproduced any more in kitty 26.5 which is included in Ubuntu 23.10.

More info:
kovidgoyal/kitty#995
kovidgoyal/kitty#1951
kovidgoyal/kitty#1432