change in behavior of cursor movement in math array

[Udicoudco]

Hello all,

Open a new file, enter a math align environment via
Insert->Math->AMS align environment
add two additional rows to a total of 3
put the cursor to the left of the equation
now press on the left arrow key several times

In LyX2.4.0 the cursor travers only the middle row,
while in LyX2.3.x the cursor travers all cells, from top
to bottom.

Is this change intentional?
I've tried bisecting but did not find
a "good" commit that I could compile
easily, I think it happened at least
4 years ago.

Udi