Grace notes and slurs

Slurs and grace notes works differently from slurs in “normal” music.

I’ve raised a question about this in the MS FB group and was encouraged to raise the question here a well.

The Problem I’ve had is that the method I normally use, i.e. select the range of notes for which I need a slur and then press “S” to get the slur doesn’t work if you have grace notes.

Two alternative methods were proposed:
1) select first note, press S to add slur, press Shift+Right to extend slur one note at a time
or
2) click first grace note to select it, click main note to select it, press S to add slur connecting them

Now, at least in my score, this results in the following:
to 1) it works but the slur is not correctly "transferred" to the part. The part still shows only a slur between the two grace notes.
to 2) works as well with the exception that in this case, the slur in the Violin I part, is extended to include the main note as well which is correct and ok.

NOTE. I tested two options, without save of the score and with save of the score but there is no change in behaviour. I didn't check the case where I reset the score /parts to the default. I attach the not yet finished score for information.

The problem is in Violin I, measure 32.

So, the question are:
1. Is the score corrupted? There are no error messages
2. Is it a specific feature of my score?
3. Is it due to my setup? I’ve the latest "official" release (OS: Windows 11 Version 2009 or later, Arch.: x86_64, MuseScore Studio version (64-bit): 4.4.4-243461245, revision: 2232670 ) waiting for 4.5.
4. Something else?

For Information, I've not used any version of MS before 4.0, so I cannot say if this is a different behaviour in 4.4.4 w.r.t. 3.6/3.7