Can't copy text more than 50 lines

I can't copy the text output if it goes beyond one screen. For example the output with "cat".

There is a 300 line yaml file. I'm trying to output and copy the contents of the file through cat. I select the text and pull down, but it fails - the selection is reset. Tried writing a python script with pyperclip - doesn't work in iSH. Tried xclip - requires x11.

Ladies and gentlemen, tell me how to copy text in ish if it goes beyond one screen.

No source file, test, or entry point is identified in the report. First reproduce the selection reset in iSH with a multi-screen cat output, then trace the copy and selection behavior; done means the full 300-line output can be selected and copied reliably.

Written by the indexing model from the issue text.