Space before punctuation and autocorrect

I'm using Swiftkey on two different phones (Sony Xperia X Compact and Xperia XZ1 Compact), but for some reason it's not working as seamlessly on the newer phone although the versions are the exact same.

My main gripe is that autocorrect doesn't apply the correct spelling on pressing the space bar as it used to, and I find myself having to select it manually in the suggestions bar.

Another annoying thing is that after selecting a corrected spelling, it inserts a space that stays there if I then write a punctuation mark, "like this ."

Any option in settings likely to fix these issues? Thank you.

(version number is 7.1.0.19)