Android app upload

When I have my andriod Nextcloud app set to auto upload on WiFi and while charging. When I take a pic why does it say uploading on the andriod status bar? Then when I go into NC under the upload tab it still says waiting for Ac. But just don’t get why showing uploading. And if on airplane mode and take a pic it shows connection error… Seems like it taking up data when I have it set to auto upload based on triggers