Pressing the Left arrow after the completions are shown moves the cursor three positions to the left.

It turns outreader.pos2xy usesreader.screen andreader.screeninfo to compute the position in the screen. Both of these include the two lines with completions. However,reader.pos andreader.buffer only include the things actually typed by the user (i.e. the third linedatetime.). This leads to the new cursor position calculation being faulty. We'll have to think more about how to fix this.

Originally posted by@lysnikolaou in#118877 (comment)