I'm using the Koler app on a Pixel 7 with GOS. I often need to look at another app while I'm on a phone call, but when I get back to the Koler app, the call screen has disappeared. I'm still connected to the call, but I can no longer use the numpad (e.g. if I'm calling a helpline and need to use their menu) or end the call myself. This is extremely inconvenient for several reasons. I'm not certain, is this a Koler problem or a system problem, and what can I do about it?
Thank you for the help.