WhatsApp is now temporarily banning users who use third-party modded version of the app.
Users who are temporarily banned from WhatsApp will get an in-app message informing them of their ban and the only way to have the account unbanned is to switch back to the official version of WhatsApp.
These third-party versions of WhatsApp offer additional features to users, like theming options or emojis.
The FAQ page on the WhatsApp website states that the third-party apps – such as WhatsApp Plus and GB WhatsApp – violate WhatsApp's terms of service and that WhatsApp does not support these apps because they are not able to validate their security practices.
The FAQ suggests that users backup their chat history in the modded app before going back to the official one.