Is this actually about how SIGWINCH handlers are installed, or is it a complaint about readline affecting how curses handles resize events? I am assuming this is about handling resize events, so is a duplicate of Issue 2675.

If it is specifically about SIGWINCH, I understand Gnu Readline recently changed its SIGWINCH handling so that it only installs the handler when it is active. As a result, we recently changed Python to install its own SIGWINCH handler on behalf of Readline (Issue 23735). But I understand in both cases, the handler for Readline chain calls the original handler, so there should be no problem.