Key with arrow next to space bar deletes all text

[a.borque]

Hello!
I own an iPad Air2 and a Pro11, which was cloned from the Air2. Both are on 12.3.1.
On the Air2 there is a key labeled with a kind of arrow turning back next to space bar when I switch to the numerical or punctuation mark part of the keyboard. When I accidentality press this key (and due to its position this happens often!) all text in the current entry box is deleted.
The strange thing is that this key is only present on the Air2. It is not on the Pro11, and can be found nowhere on the iPhone or iPod.
I have checked the settings in both iPads, but they are identical. So what is that key and how do I get rid of it?
Thanks for help!
A.Borque

 

[Shirasaki]

If you can manage to get a screenshot, members here might be able to help you better and quicker.

 

[a.borque]

Here it is...

 

[tarsins]

That's UNDO. Larger iPads have it as a labelled key (along with REDO) on, I think, the left. Maybe shaking your iPad will REDO the UNDO.

 

[a.borque]

That's UNDO. Larger iPads have it as a labelled key (along with REDO) on, I think, the left. Maybe shaking your iPad will REDO the UNDO.

Hi!
Thanks for the reply. Attached you can find the same view/situation on my Pro11. There is no such Undo-Key right of space bar. So I wonder, whether there is a switch in settings or another keyboard to select to turn the Undo key off on my Air2, or whether it is model specific and therefor the different keyboard layouts can not be made to look and work the same way.
Thanks once again!
A.Borque

 

[Shirasaki]

I think it is model specific and you cannot really do anything about it, just like I cannot have a nice number row on my iPad Pro 11”.