iOS keyboard does not type into field after first press of field

The best way I can explain the issue is this-

For iOS 12+, when the user taps the input box to type, the keyboard comes up, but there are no characters being added to the input box. You have to tap again to gain focus, then it works fine.

It seems like something is up with the iOS version not gaining focus until you press it twice. I tested the same scenario on an iphone with iOS 11.2.6, and it worked perfect. The phones that displayed the issue were both using 13.3.1.

After tapping just once:

After tapping a second time:

Any ideas or suggestions?

Ionic version: 1.3.3
Cordova: 8.1.1
iOS: 5.1.1

Using ionic-plugin-keyboard @2.2.1
I tried using the new cordova-plugin-ionic-keyboard, but same outcome.