The reason for the issue is having different names for the product on the Product Field and Name Field
Here is the way to solve this problem;
Main Menu > Products > Menu List > Menu > Select the Not Found Product’s Category > Edit Product Properties > Check the Name Field if it is the same as Product Field.
In the Name Field, the product name has to be written exactly the same as in the Product Field.
After that you need to restart the SambaPOS Messaging Server from the Windows Services part and click on the Database Update button on the MC3 App.