Gustavo Barros <gusbrs.2016@gmail.com> writes:

> On Sat, 15 Apr 2023 at 08:41, Ihor Radchenko <yantar92@posteo.net> wrote:
>
>> Gustavo, what happens if you put (load "org-agenda.el") in your init.el?
>
> Problem gone, the space is not propertized.

So, it really looks like compilation problem.

I am now looking into Elisp manual

    2.9 Mutability
    
       When similar constants occur as parts of a program, the Lisp
    interpreter might save time or space by reusing existing constants or
    their components.  For example, ‘(eq "abc" "abc")’ returns ‘t’ if the
    interpreter creates only one instance of the string literal ‘"abc"’, and
    returns ‘nil’ if it creates two instances.  Lisp programs should be
    written so that they work regardless of whether this optimization is in
    use.

So, it should be a good idea to avoid setting text properties in string
constants in general.

See the attached patch.
Though I have no clue if this is enough to fix the bug...