Why are app icons showing the android symbol?

Question

Android

Faced such a problem: after buying the phone, I installed all the necessary applications, incl. Whatsapp. Then, after some time, I noticed that instead of the usual icon of this messenger, an icon with the android symbol appeared. I forgot about it, I thought it would go away on its own. But other applications also began to get sick of it. It does not affect the operation of applications in any way. How to be?

Answer 1

I would like to clarify - is the launcher native or third-party? Phone specs?
The icon is shown. when for some reason the OS can't display "native".