I change the encoding sometimes the text disappears

[УменяМодем ОграниченныйТрафик]

I have a UTF-8 encoding in my notepad
When changing the encoding to another - ANSI sometimes gets lost - all the text disappears!
Why is this happening!? How to return it
I need ANSI for the “балаболка” program, it sounds the text in an electronic voice

[Claudia Frank]

@УменяМодем-ОграниченныйТрафик

can you replicate this? If so, can you post some sample text?

Cheers
Claudia