SelectedItemBinding for DataGridComboBoxColumn becomes null when switching between tabs?

Question

css

Hello.
I observe very strange behavior and I can not understand what is the reason.
There is a TabControl with two tabs, one of them has a grid with a DataGridComboBoxColumn.

<DataGridComboBoxColumn Header="Цель" MinWidth="100"                                                                     
ItemsSource="{Binding Values}"
SelectedItemBinding="{Binding Value, ValidatesOnDataErrors=True, UpdateSourceTrigger=PropertyChanged}"/>

When this tab is opened, the grid is filled correctly, i.e. there are values ​​in the DataGridComboBoxColumn cells, if you switch to the second tab, and then return back, all values ​​are empty.
Some write that it is necessary to use

<Setter Property="IsSynchronizedWithCurrentItem" Value="True"/>

but it didn't help me.
Very strange behavior, how to solve the problem?
Thanks in advance.

Answer 1

Of course, xs, but why not just flex?)
Yyyy

Answer 2

https://jsfiddle.net/9gdL9oum/3/

Answer 3

Well, you fixed the picture. and who will align the text also on middle?
https://jsfiddle.net/9gdL9oum/4/

Answer 4

img {margin-top: -5px;}

Answer 5

A complete guide to centering (both horizontally and vertically)

Answer 6

position:absolute;
top:50%;
transform:translateY(-50%);
the parent has position: relative, respectively,
and the adjacent element has margin-left: the image width