I've had a similar experience with autocorrect on Android across multiple phones (lg, samsung) and keyboards (gboard, swiftkey) around the same time, I'm curious to know whether it's just my own bias being validated or something happened. All predictions have become completely stupid (switching languages mid sentence when they were robust in the past, finding least consistent suggestion first, suggesting very random terms I've never seen like "Gaylene" when I swiped to write "happened", etc).