Gboard is not perfect and shows some erratic behavior described by the parent poster, but it isn't as bad as Apple's keyboard in my experience. However, SwiftK

Gboard is not perfect and shows some erratic behavior described by the parent poster, but it isn't as bad as Apple's keyboard in my experience. However, SwiftKey might be more conservative and feels a bit slower at times, but its autocorrect and prediction do a really good and consistent job.