Very buggy update, can I get the old version back

Last week I updated Swiftkey to its latest version for the IPhone. It has been a disaster ever since. For starters, everytime I try to use the swiftkey keyboard, i have to toggle through all of my keyboards (have 4). In the old version, i could continue in the last keyboard used. At times I cannot reach the swiftkey keyboard from whatsapp or messages, so i am forced to close the application and run it again so I can access swiftkey. Finally, when I finally get to the swiftkey keyboard, I have to wait a few seconds before it is activated.

I see no other comments on this forum of similar problems, and this is the first time I seek support from swiftkey, which I have been using for many years. I hope you can tell me if it is a problem that I have, or if the software is buggy and, if it is, when can we expect an updated version of the software or how can i reinstall the prior version.  Thanks.