swiftkey is actually deleting spaces after I manually add them?

Hi folks,

Recently Swiftkey has started behaving strangely. At first I thought it was just a case of 'auto space' being turned off somehow (although I didn't do that) - but then (after totally failing to find any way to turn auto space on or off - despite following multiple online instructions) I realised it's worse than that.

When I type or flow several words, swiftkey will randomly remove the spaces between them - even if I manually typed those spaces!? Not always, but often enough that I look like a barely literate typer - and this makes the tool completely unusable. I've had to go back to the - totally unintuitive - iOS keyboard.

Can someone please tell me what's going on, and - more importantly - how to get back to the usual Swiftkey operation that I have come to depend on?