bug#52128: 29.0.50; column-number-mode causes point to jump around

[Eli Zaretskii]

> From: Joseph Mingrone <jrm@ftfl.ca>
> Date: Fri, 26 Nov 2021 15:50:52 -0400
> 
> If emacs is started with:
> 
> emacs -nw -q -l /home/jrm/.emacs.d/custom-lite.el blah
> 
> with custom-lite.el only containing
> 
> (custom-set-variables
>   '(column-number-mode t))
> 
> Then typing characters will cause the point to move around in unexpected
> ways.  For example, when typing
> 
> 12345678
> 
> into the scratch buffer, after the 8 in entered, the point is moved back
> to the second column (over the 3).

I cannot reproduce this.  Does it happen with "emacs -Q"?  If not,
some of your site-init files could be related to this.