Hey,

I am having the following issue that the buffer gets corrupted when
horizontally resizing the terminal window.

For reference please see this thread:
https://bbs.archlinux.org/viewtopic.php?id=214830

Screenshot:
https://s32.postimg.org/6hws6v39x/Screenshot_from_2016_07_13_23_15_31.png

A user pointed out that it is caused by "zle reset-prompt".

Is this intentional behavior that the old buffer gets corrupted when
resizing the window?