Ion-input jumps to next ion-input

I use ionic 4 latest version and have a grid with several ion-inputs in separated ion-rows.
Unfortunately when I add some content in one ion-input it jumps directly to the next and add the content there too.
It looks like a very strange behaviour to me.

0 was there, I added the 3:

or I typed “alles”:


Please supply your code and template markup, so we can see how you set up it up.

I think I solved it, at least it works now:

I had a two dimensional array with the data for the ngModel:

with a simple array it works now!