Hi Andre,
in order to close issues, one needs to be member of the translation project.
When I (German translator) had the same issue 2 years ago, I was manually added
by Piotr. A simple approach could be to grant coordinators the maintainer role
so they can manage their team members
It seems that sometimes translation bug reports (issues) remain open
though they have been fixed by translators, simply because translators
don't have permissions to close them. Random examples:
https://gitlab.gnome.org/Teams/Translation/pt/-/issues/11#note_1089460
