I'm having a hard time reproducing this on the latest master, although it's clear from your image that something is going wrong. How are you marking the tasks as DONE? When I use C-c C-t to mark them as done, it doesn't add the "CLOSED" tag by default under emacs -Q, so I'm wondering if it's something about your or the spacemacs configuration that's causing this?

On Sun, Sep 20, 2020, at 02:37, Krishan Kharagjitsing wrote:
> Hello, I found the following weird behaviour. I first reported it to the spacemacs github (https://github.com/syl20bnr/spacemacs/issues/13901) but they confirmed that it is an upstream bug.

> When I set some tasks to DONE and fold the headings with TAB, then when I cycle back from DONE to TODO it joins the next line with the current one.

> 

> org_mode_bug <https://user-images.githubusercontent.com/22841170/91837051-ed877000-ec4b-11ea-9698-151288dcc853.gif>

> Reproduction guide

>  * Make two TODO headings in org mode
>  * Cycle both TODO items to DONE
>  * Fold the headings (so the dots appear, because the timestamp gets folded with the heading)
>  * Cycle the first DONE heading

> *Observed behaviour:* 
> The next line gets joined on the current one.


> *Expected behaviour:* 
> No joining of lines.

> System Info 

>  * OS: gnu/linux (WSL2, connected via X410 to Windows)
>  * Emacs: 28.0.50 (also tested it on 26.1, same behaviour observed)
>  * Graphic display: t
>  * Distribution: spacemacs
>  * Editing style: vim
>  * Completion: helm
>  * Layers:
> (helm auto-completion emacs-lisp org themes-megapack treemacs)
>  * System configuration features: XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB NOTIFY INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS PDUMPER LCMS2