UITextfield with secureTextEntry bug in ios 14

Now I use uitextfield for my password field and enable isSecureTextEntry = true but I found a bug, when I typing other languages ( not english ). It not show secure character ( • ) but I got blank charater instead like this..

It happend on iOS 14.5 but on 12.0 It working fine. Has anyone seen this issue? Thank you.

UITextfield with secureTextEntry bug in ios 14
 
 
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