UIButton close to keyboard does not receive touch event - ios

You can test by yourself by cloning this repo https://github.com/sey/ios-keyboard-test.
The problem is the following:
When you enter text in a UITextField and you want to quickly tap a button which position is close to the keyboard the button does not receive touch event at first. You need to wait a small amount of time before tapping on the button does anything.
In the linked project the button action is set to clear the text field. If you enter text and touch the button quickly you will see that the text field does not get cleared and you'll have to touch the button again. If you tap on the button that is on top of the text field (not close to the keyboard) everything work as expected.
I suspect this is a bug from Apple. And I suspect this comes from the fact that some keys on the keyboard show other keys when you long press them (such as E, U). And maybe a hidden frame prevents from touching the button immediately after entering text.
My questions are:
Can you reproduce the bug? And do you know if this has already been
reported with a workaround or else?
[EDIT] Please test in landscape mode.

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