Problem with grade overrides in Spanish sites

As a instructor go to a Spanish site and create a new GB item Create an assignment with group submission and link it to the existing GB item created in 1. Click on "Calificaciones" ("Grade") Click on any group name Set a grade with two decimals not being the last one a zero (e.g: 9,45) Click on "Save and release" -> Everything is ok, the group grade is 9,45 and the "Grade overrides" option is not checked Set a grade with one decimal (e.g: 9,4) or two decimals being the last one a zero (e.g: 9,40) Click on "Save and release" -> The group grade is 9,40 (OK) but the "Grade overrides" option is checked and all the students' grades are 9,4.