Quick answer: Godot 4 C# string.Equals returning false for identical-looking strings across locales? Default culture-aware comparison treats some characters as equal in one locale, not another - use Ordinal.
ASCII string from network compared to a locally-typed equivalent; equality fails in Turkish locale.
Use StringComparison.Ordinal
s1.Equals(s2, StringComparison.Ordinal)Byte-level equality; locale-independent.
Or use OrdinalIgnoreCase
If case-insensitive needed; locale-independent.
Audit network string comparisons
Each network-sourced string comparison. Default culture-aware is the bug surface.
“Default string comparison is culture-aware. Network data needs ordinal.”
Establish 'Ordinal for data, culture for display' as project rule.