(created by mistake) TMP_Text visual artifacts, bugs, missing characters

Have you guys seen this kind of TextMeshPro bugs before?

In the editor and in the stadalone build (win64) everything looks fine on my computer, but on other computers sometimes the text looks broken, shifted characters, line errors.

Screenshot from my PC:


Photo from client's screen with text errors:


From Unity Editor:


Photo from client's PC with text errors:


Why does this happen, what could be the problem?
* Video card drivers updated.

Unity 2018.2.13

 

Mistake of understanding. There is no rendering error, this client sent processed PDF files with fragmentary text recognition - this is the cause of visual errors.

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