Why is it that every time I search for a friend's account name, it often doesn't

Product: EA SPORTS FC Mobile
Platform:Android
What's your device's make and model? Realme c53
What's your device's firmware? Unisoc Tiger T612
What is your game version? Latest
In what game mode did the bug occur? H2H
How often does the bug occur? Every time (100%)
What happens when the bug occurs? I'm so annoyed with this bug
What time did you see the bug? (HH:MM AM/PM) Every time I want to 1 vs 1 with a friend, but don't have his account name

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Not in FIFA, not in FC mobile, why can't i search for my friends' names in this game?