Your mobile devices might be telling your printer to use the rear tray.
The paper type you are selecting is set to feed from the rear tray.
Bay Area - CA
~R5C (18.104.22.168) ~Many Lenses ~DxO PhotoLab Elite ~Windows10 Pro ~EVGA RTX 3080Ti FTW3 Ultra
~ImageClass MF644Cdw ~Pixel6 ~6D2 (v1.1.1) retiring