Problem with Tab-Order in table inline editor

I am trying to implement an easy, kind of “mass-editing” screen using a table. So the editable table seems to be perfect.
I need only few columns editable in the table.
When jumping from field to field in the table it works, as long as I do not enter a new Value.
But when I edit any value and TAB to the next field, the focus jumps always to the first field in the first line of the table.

I am using cuba 7.2

You can easily check it in the demo on your website

It also happens in JMIX:

I just need a table where I can edit one or two columns in a number of rows, easily jumping to the next field and row by using the TAB-key (ENTER might also be possible).

Is there a way to do this?