Eduardo Suarez-Santana <esuarez@itccanarias.org> writes:

>> I am unable to reproduce. What are your Org and Emacs versions?
>
> I'm using Spacemacs (develop branch).
>
> - Emacs 27.2
> - Org 9.5.1
>
> I get a weird behaviour about it. These events appear when I start emacs. If I
> edit somehow these entries they disappear from the agenda view (until I start
> emacs again).

Confirmed

Thanks for the hint! I was able to reproduce entries disappearing from
agenda view.

The culprit is org-in-src-block-p. It relies on fontification to
determine if we are inside a code block. However, when you strip a code
block with SCHEDULED inside from begin/end lines, the fontification
properties do not get removed.

The attached patch should fix the issue. However, I need several people
to test it first - the patch will make things slower without cache.

>> Depending what you want, you may use org-agenda-todo-list-sublevels or
>> add agenda filter excluding specific tags that you can then use to mark
>> undesired subtrees.
>
> Could be a workaround. Thanks a lot.
>
> Anyway it looks like a bug to me.

For future. You will make things much easier if you provide a clear
sequence of steps to reproduce the problem. Your original report is not
reproducible if I just copy-paste your code into a new org file. I had
to guess what you did in order to see the problem.

Best,
Ihor