Measure number offsets are not remembered

1) Create a new General Treble Clef score.

2) In the measure number's style the Position below is x = 0.00 and y = 1.00 (non-default).

3) Set the Vertical placement to Below.

4) Reset the Position below to default (x = 0.00 and y = 2.00).

5) Save and close the score.

6) Reopen the score.

7) The measure number's Position below has reverted to x = 0.00 and y = 1.00.

Note: Regardless of the values set for x and y, they always return to 0.00 and 1.00. The same behavior occurs if you save the style and reload it in a different score.

Operating system is macOS Catalina.