TextMesh Pro Input text field deselecting on keys

@Stephan_B

I don't believe I have any code for key events, except having rewired in my project. It works fine in a brand new scene, but in my current scene with my UIs it doesnt, even if i replace the input field to a new one

I moved from 2018, to 2019 with this update, and for some reason now when I am typing something in the Input text field, certain characters such as A, space, etc, will deselect the input field and not type in it, but other ones such as E, F, T etc will work...

How do I debug this to figure out whats going on?