[MU4 Issue] Ties in tablature are positioned the wrong way round

[rgreen5]

Describe the bug

It appears that MS4 is setting the position (above/below) of ties in tablature wrongly – at least in imported MS3 files. e.g.

MS3

MS4

To Reproduce

1. Open the attached MS3 file in both MS3 and MS4.
   ties_wrong_way.mscz.zip

2. Compare and contrast the positions of ties in mm 1,2,3, and 4.

RESULT: The ties which were correctly oriented upwards in MS3, now point downwards.

Expected behavior

Ties should be correctly oriented by default, as they were in MS3 (and should respect positions set in MS3).

Platform information

OS: Linux Mint 20.1, Arch.: x86_64, MuseScore version (64-bit): 4.0.0-223020418, revision: github-musescore-musescore-fa12b58

[cbjeukendrup]

I think you mean ties, don't you? Or both ties and slurs?

[rgreen5]

Oops. Have corrected post and title.

[asattely]

edit: So I've been looking at this one and it seems to be a difficulty with scores saved with a <showBackTied> property. This wasn't being taken into account on 'simple' type staves. I think I have this one licked, need to test it a bit and then I'll submit the PR.

[rgreen5]

See also, #12530.