[Bug] Pressing the Sleep Mode Button does nothing

[poyribn]

Checklist

• I make sure that the issue is NOT a duplicate of pinned issues
• I make sure I am using the LATEST version - check here
• I understand that issues with limited impact, such as those occurring on specific devices or under specific network conditions, will not be fixed
• I have attached the error report in the issue

Describe the bug

When i press the Sleep Mode Button at the Video Player, nothing happens.
Or at least it doesn’t show me that anything has changed.
Reguardless if Sleep Mode still functions, it’s unusable because the Button has no Feedback for activating it.

Version

5.1.1

Frequency

Always (100% of the time)

Device

Samsung Galaxy XCover7

Steps to reproduce the bug

1. Start a YouTube Video
2. Press the Sleep Mode Button
3. Notice the Sleep Mode Button does nothing

Additional context

Only tested with Videos on YouTube.
This Bug may or may not occur when playing Videos on other Platforms.