Firewall disables itself

Can you do me a log?

a) Create an empty file called “avast-debug” on your /sdcard root directory
b) REBOOT your phone
c) Now Avast generates a lot of log
d) Try to reconstruct your problem
e) After 10 minues, open Anti-Theft (NOT Mobile Security) and go to the feedback screen (About)
f) Check “Send system log”
g) Create a case there giving your email address and mention this conversation as well as a short description of the problem (maybe someone else will get the case)
h) Then remove the avast-debug file from the /sdcard root directory again
i) REBOOT your phone
j) Everything back to normal

unfortunately I can not reproduce the problem which seems to be quite random
and depending on possible changes of data connection state (3g<->roaming)…
do you think that log is useful even if I am not able to reproduce the problem?

update: I was lucky and I reproduced the problem at least twice and I am about to send the log
following the procedure you suggested,

thanks Cristiano

I have sent system log through anti-theft,
let me know if the log is ok,

regards Cristiano

lets continue in support case.