'Keyboard's globe button (🌐) was disappeared, iOS 15

when updated to iOS 15 , my app got this issue. Keyboard's globe button (🌐 at left bottom corner) was disappeared, but we could click it.

Does anyone have an idea of what could be happening here?

ios uikit uikeyboard

Solution 1:^[1]

tl;dr: I found method setFrame: in a category of UIImageView like this.

-(void)setFrame:(CGRect)frame{
    xxxxxx;
    if (yyyyyy) {
        zzzzzz;
    }
    [super setFrame: frame];
}

Remove this category, globe button was back.

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Solution	Source
Solution 1	Tintin