Why is my Python CLI input mangled?

When I invoke /usr/bin/python3 (from python3-3.14.7-1.fc44), whether in konsole-26.08.0-1.fc44 or warp-terminal-preview-v0.2026.09.02.08.27.preview_01-1 (irrespective of whether first invoked in another shell, like powershell-7.6.3-1.fc44, or bash-5.3.9-3.fc44), if the terminal emulator’s window is short, the first few lines, of code that I paste into it, are redacted from the pasted output: Python 3.14.7 (main, Aug 10 2026, 00:00:00) [GCC 16.1.1 20260515 (Red Hat 16.1.1-2)] on linux Type "hel...