If you want to use an external keyboard with an iPad, there are two Accessibility settings to be aware of.
I suggest that you disable “Accessibility -> Keyboards -> Full Keyboard Access” and enable “Accessibility -> Keyboards -> Key Repeat”.
If “Full Keyboard Access” is enabled, some pretty strange stuff will happen when you are trying to use the keyboard arrow keys to move the text cursor around.
If “Key Repeat” is disabled, you have to manually repress a key to repeat it, and this is undesirable when using the arrow keys to move the text cursor around.
John Carter Sr