Blackview A10 no whatsapp notifications

Hello all,

Recently I got a Blackview A10. After installing all the application I went through the process of disabling the battery optimization and locking those apps that I would like to keep receiving notifications even when they are closed.

I managed to do this for all the applications (gmail, facebook and messanger) but not for whatsapp. I did a factory reset to the phone but still no luck.

Is there anything else that you suggest I can do to solve this issue?

Thank you.