CEA608 captions show ⠀ (Braille pattern blank) instead of whitespace

[dhmmNagra]

Have you read the FAQ and checked for duplicate open issues?
YES

If the problem is related to FairPlay, have you read the tutorial?

N/A

What version of Shaka Player are you using?
v4.7.11-uncompiled

Can you reproduce the issue with our latest release version?
YES

Can you reproduce the issue with the latest code from main?
YES

Are you using the demo app or your own custom app?
The demo

If custom app, can you reproduce the issue using our demo app?
N/A

What browser and OS are you using?
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

For embedded devices (smart TVs, etc.), what model and firmware version are you using?
N/A

What are the manifest and license server URIs?
uri= https://livesim2.dashif.org/livesim2/testpic_2s/cea608.mpd

What configuration are you using? What is the output of player.getConfiguration()?

Standard config from the demo

What did you do?

1. Play the stream
2. Enable captions by selecting eng from the menu
3. Observe the text/captions displayed on the screen

What did you expect to happen?
eng: 00:34:21:00 i.e. whitespace between the : and the timestamp.

What actually happened?

A ⠀ (Braille pattern blank) is observed instead of whitespace.

FYI DASH.js renders whitespace

[dhmmNagra]

This traces to

shaka-player/lib/cea/cea608_memory.js

Line 296 in 4655271

[0x36, '£'], [0x37, '♪'], [0x38, 'à'], [0x39, '⠀'], [0x3a, 'è'], [0x3b, 'â'],

shaka.cea.Cea608Memory.CharSet.SpecialNorthAmericanChars = new Map([
  [0x30, '®'], [0x31, '°'], [0x32, '½'], [0x33, '¿'], [0x34, '™'], [0x35, '¢'],
  [0x36, '£'], [0x37, '♪'], [0x38, 'à'], [0x39, '⠀'], [0x3a, 'è'], [0x3b, 'â'],
  [0x3c, 'ê'], [0x3d, 'î'], [0x3e, 'ô'], [0x3f, 'û'],
]);

Currently working on a fix for it.