Ok so I did more tests and got strange behaviors. With the command you provided or via a simple script, RESET works 1 time only but... if you throw a QUIT, it works O_o
then I did the following:
~$ echo -n "LOAD_STATE" | nc -u -w1 192.168.1.30 55355
~$ echo -n "RESET" | nc -u -w1 192.168.1.30 55355
~$ echo -n "LOAD_STATE" | nc -u -w1 192.168.1.30 55355
1st command: success
2nd command: success
3rd command: fail
O_o
This is definitely a strange behavior from RA.
I tested this on my X86_64 recalbox, I'll do more test tonite on the rpi3 one.