Message sending problem – Botim - Video and Voice Calls Review

Im using BOT for 3 years now and its a perfect app for me. When i updated my iphone to 13.0 my only problem now is when i send messages, i need to ring the recipient to be able to received my messages coz there is no notification on his/her side or unless he/she open BOT app so they can received all my messages. From my side it shows only one check from my message box but i am connected through data even wifi. Is there any prob on the app or from my phone? Please help. Thank you and more power!?
Review by Ruby718 on Botim - Video and Voice Calls.