Some Walker noteheads are backward

OS: Windows 10 (10.0), Arch.: x86_64,
MuseScore version (64-bit): 3.6.2.548021803,
revision: 3224f34

The Walker noteheads are not implemented correctly in four cases:
Re (the crescent) with a down stem ought to be faced with the points away from the stem
Re as a whole note ought to be faced with points to the right instead of left
Ti (the isosceles triangle) with an up stem ought to be pointed toward the stem
Do (The rhombus) ought to have a stem centered on the notehead

The notehead mirroring function doesn't actually mirror the notehead--it simply moves it to the other side of the stem.

Since I'm condensing the usual 4 staves (one for each voice) into 2 staves and stacking notes, the Do stem doesn't bother me, but the other three are glaring for those who have sung from Walker's tune books.

Is there a workaround for this?

I don't have any interest in Musescore 4 right now.

I'm including a picture of Musescore's style and and Walker's style.

Thanks in advance.

Robert McIntyre