Missing pixels in the drop shadow

Hi,

There is a kind of cutoff that causes a few pixels to be missing with certain custom subtitles settings, like the subtitles are contained in an invisible box that is a few pixels too tight.

The problem is present in tvOS 11 and 11.1 (I don't have an earlier version.)

Settings to reproduce the issue:

General > Accessibility > Subtitles and Captioning > Style > Edit Styles > New Style

Text Font: Trebuchet [Video Override Style: Off]

Text Size: Medium [Video Override Style: Off]

Text Color: White [Video Override Style: Off]

Background Color: Black [Video Override Style: Off]

Background Opacity: 0% [Video Override Style: Off]

Advanced Text Opacity: Opaque [Video Override Style: Off]

Advanced Text Edge Style: Drop Shadow [Video Override Style: Off]

Advanced Text Highlight: Black [Opacity: 0%, Video Override Style: Off]

Steps to reproduce the issue:

1. Use an App that support custom subtitles: Netflix or DramaFever (the iTunes movies/TV shows apps have a problem rendering custom subtitles settings which is reported in another post.)

2. Find some content with very bright/light content (e.g. white walls, snow, white shirt)

3. Turn on English subtitles

4. Notice missing pixels with some letters drop shadow , e.g. on the left of a capital T at the start of a sentence or under letter like g or y.

Sample pictures of the issue: