CallKit lock screen UI on iOS 26: “slide to answer” text is too faint / hard to read

Hi everyone,

We noticed a readability issue with the CallKit incoming call UI on the lock screen in iOS 26.

In our case, the “slide to answer” text appears too faint and unclear, making it difficult to read. The arrow button is visible, but the text itself has very low contrast against the background, especially on certain wallpapers or under lower brightness conditions.

From the screenshot, you can see that:

the caller name is clear,

the overall incoming call UI is shown correctly,

but the “slide to answer” label is barely visible.

This seems to be a system UI / CallKit presentation issue rather than something controlled by the app, since we are using the standard CallKit incoming call flow.

We would like to know:

1. Has anyone else seen this issue on iOS 26?

2. Is this considered a known UI regression or contrast issue in the new system design?

3. Is there any supported way to improve the visibility of this text, or is it fully managed by the system?

Any confirmation or related reports would be very helpful.

Thanks.