Hi there,
which shell command/script have you used?
You can use something like this on the Raspberry PI to log all the data with some rough timestamps:
$ sudo apt-get install moreutils
$ mosquitto_sub -v -h localhost -t ‘dwm/#’ | ts ‘[%Y-%m-%d %H:%M:%S]’
Please check also the range between the Tag and the Gateway. When correctly installed, the 10 Hz should work with reception rate better than 99%.
Cheers,
TDK