[nh2]

input_delay doesn't seem to address this in general: Even when set to 50 (which is very noticeable), the cursor on the next line just appears with some delay.

None of the settings from https://sw.kovidgoyal.net/kitty/performance/ seem to affect its appearance.

[big_alfredo]

Interesting, In zsh I experienced the exact behavior you described and setting input_delay to 10 completely resolved it. To be fair, when testing my PS1 was simply '%m$ '.

I just benchmarked 'starship prompt' and when in a directory managed by git, it can take well over 10ms. I imagine with a more advanced configuration it would take even longer. urxvt must be doing something special.