Unable to access other WhatsApp chats during a call after update

I used to be able to make a WhatsApp call and while still on that call I could access all my WhatsApp messages and type replies to contacts. Since the new update I can make the call , look at WhatsApp for the contact I’m on the call with BUT there is no longer a bar with a left arrow that lets me access my other chats . Is there a fix and/or is anyone else experiencing this new glitch to whatsapp

[Re-Titled by Moderator]

Original Title: WhatsApp Issue following update