Unable to capture specific packet. Looking forward for some help here.

I am in an open WIFI network (network without password) and trying to sniff some particular packets which contain credentials. This packet is sent from Android device to IP Camera.I am capturing packets at two locations :

• Using `tcpdump` on Android device
• Using `tcpdump` on linux laptop using external adaptor (with monitor mode enabled)

I am able to see the packet in dump taken on Android device but the packet is not captured on laptop.Why is it that I cannot capture the packet on laptop ?

While learning networking, I learnt that we can capture ALL packets in wifi network if we enable monitor mode. If this is the case, then why is that packet missing from capture done on laptop?