Verbatim and predictions swapped

In Polish I have the problem that the middle prediction is always verbatim (exactly what I type) when the autocorrect option is switched on. The real prediction is in the left prediction instead. When switching autocorrect off, the middle prediction is a real prediction again. As the polish language largely depends on accents above characters that makes it a little hard to write fluently. I have two other languages installed (English and German) and in none of them SwiftKey produces this error.

Steps already taken to resolve the problem:
Deleted language and reinstalled after restarting the device
Deleted app cache
Deleted app data
Can't completely remove the app as im on a Sony device and it came pre-installed and undeletable

Debugging Info:
Device: Sony Xperia ZX1 Compact (Build 47.1.A.12.179)
Android Version: 8.0.0
SwiftKey Version: 7.0.5.45
Apps in which the error occurs: all (e.g. Messages, K9 mail, duolingo, a calendar, Chrome and many more)

Is there something more I can do from my end to resolve this problem? I'm prepared to do some further debugging if necessary if you give me instructions what to do (maybe USB debugging? I can't root my device or unlock the bootloader, though).