Nicknames contain the value null

[Nico8340]

Describe the bug

Nicknames sometimes contain the word null, because there are fewer entries in the arrays at the specified length (Probably a result of #3777)

Steps to reproduce

1. Open the main menu
2. Open the settings
3. Generate a new nickname on the Multiplayer tab by clicking the button with an icon

Version

No response

Additional context

v.1.6.0-release-22789 (Windows 11, 64-bit)

Relevant log output

No response

Security Policy

• I have read and understood the Security Policy and this issue is not security related.

[Nico8340]

Closing as fixed in #3834