Tabindex always "-1" for table accessibility

[LEinfeldt]

I'm trying to build a form with structured data in a table. I need to display form inputs and a button in a table with 3 columns.

However, when I built the app, I recognized, that it is not possible to navigate with tab in my form. All the table-cell directives and the table-rows get a tabindex="-1" in the devtools.

In the source code I found the @Input allCellsFocusable so I set this property on the table.

<table fd-table [noBorderY]="true" allCellsFocusable>

But this does not have any effect on the inputs in the table. This behaviour is not accassible, but I need to have the website accassible.

Even with setting all table data to [focusable]=true did not change the tabindex.

Also I regognized, that the behaviour is not the same each time. When I manually clicked into an input, this single input is navigable via tab, while the others aren't.

I've deleted all surrounding logic and built a minimal example here for reproduction: https://github.com/LEinfeldt/fundamentalngx-table-example

An additional Info, that I just found: The tabindex is initially 0 - I can see that in the debugger and in the elements of the devtools. When I tab into the first header cell, this changes the tabindex of all other cells to "-1". This does not trigger the _updatecells method of the TableComponent.