Error in yaml syntax highlight in source editor

The source editor gets confused while trying to identify keys in key-value pairs of yaml, failing to identify valid strings for keys because of the presence of accented characters, like in this example:

A sloppy translation for the content of the figure above would be:
session.yaml file, with

#
next:
   - date: 2026-06-26
     from: 14:00
     to: 15:00
     scheduling:
     topics:
       - 
     activities:
       -
#

I also noticed that strings with spaces within, although a bad practice, would still be valid values for keys and yet they are not highlighted as keys in source editor

Would this be reasonable to fill a bug issue?