I have some customers reporting extreme keyboard lag when typing anything in our app. I have two movies demonstrating this behavior:
As well as this movie:
I really don't believe that this is related to any of our code -- this is the standard keyboard in both cases, and if somehow our code was blocking the UI thread the OS would kill our app.
We are unable to reproduce this behavior in-house and this only seems to apply to a handful of our customers.
If you search "keyboard lag" on Apple dev forums you will see numerous threads:
- https://developer.apple.com/forums/thread/5071
- https://developer.apple.com/forums/thread/79442?answerId=235108022#235108022
- https://developer.apple.com/forums/thread/665191?answerId=656127022#656127022
- https://developer.apple.com/forums/thread/671132
However, most of these threads are very old and it's not clear that there is or was a resolution.
This issue seems to have persisted across multiple releases of iOS 14 for our members. We opened a ticket with Apple DTS but they were unable to offer any guidance.
Has anyone here experienced this issue themselves, and can anyone offer a workaround beyond hoping that this is an iOS issue that Apple will fix in the future?