On a Google Pixel XL, Swiftkey is leaving a space between the end of the last word in the sentence and period, question mark, etc. It's also performing odd spacing when quotes are involved. For example, try to swype the following (This is a "test") and what you actually get is This is a"test " - no space between the a and the open quote and then an unwanted space before the close quote.
Anyone else?
Anyone else?