Reproduction steps:
1. Create a new project
2. Window > Multiplayer > Multiplayer Center
3. Select any “Genre of your Game” and “Number of Players per Session” dropdown options in the Multiplayer Center window
4. Press “Install Packages” button
5. Edit > Project Settings…
6. Press “+” and enter a long name
7. Observe newly created Player Tag

Actual result: Player Tag name does not get truncated
Expected result: Player Tag name gets truncated

Reproducible with: 6000.0.66f1, 6000.3.5f1, 6000.4.0b5, 6000.5.0a5

Reproduced on: Ubuntu 22.04, macOS Sequoia 26.2 (M4)