Bose ANC 700 WhatsApp call bug

[Wasura]

When there's a voice call I can answer by tapping double on the headphone. But when I need to answer a WhatsApp call it just says "Call Ended" and disconnect the call from the headphone. I have to manually answer the call and click the Bluetooth icon to connect back to headphone. Is there any solution for this? Please update the app with this feature.