Freezing and Lag in Input Forms (City, State, Zipcode)

Very frustrated with the performance of SwiftKey when it comes to entering data into forms. I do a lot of this in my day-to-day, and every time I need to enter a zipcode, city, or state, the app either freezes for 10-20 seconds before responding, or it enters letters very slowly. 

For example, entering Las Vegas would take me about two minutes because only one letter would show up every 10-15 seconds... pretty excruciating to behold.

L...A......S.........V..............E.................G..............A.................S...............

The worst is when I enter a wrong letter and have to wait ANOTHER 15 seconds for it to delete the wrong letter.

For some reason, this only happens with city, state, and zipcode. 

I assume this has to do with Google's autofill feature, but I can't figure out how to get around this issue without deleting SwiftKey and using the basic Android keyboard.

Help is appreciated!