Grade decimals are missing prior to the release of grades when using the marking workflow

In assignment grading when using marking workflow and rubric, the grades are displayed as integers.
Before MDL-69867 they were displayed with decimals.

Attached are screenshots of the grade in view submissions (mod/assign/view.php?id=xxx&action=grading), and marking workflow before and after MDL-69867 (mod/assign/view.php?id=xxx&action=grader&userid=xxx)

Example:
The student got a grade on 3.5 from 5. This is displayed in "View all submissions" as "3.50 / 5.00".

Expected result:
"Current grade in assignment" should display the grade as decimal. The grade was displayed as "3.5" before MDL-69867.

Actual result:
"Current grade in assignment" displays the grade as "3 / 5" (integer, not decimal).

Steps to reproduce:
As admin:

• Create a Course

As teacher:

• Enrol a Student in the course.
• Create an Assignment in Course.
• Set "Grade" to "Point" and "Grading method" to "Rubric"
• Set "Use marking workflow" to "Yes".
• In "Advanced grading" define a rubric with at least two criteria.

As student:

• Submit an assignment.

As teacher:

• Open assignment and grade.
• Grade the student's submission using the rubric and change the Marking workflow state to "In review".
• Save changes.
• Confirm that decimals are shown in "Current grade in assignment".