I noticed today that if you get disconnected, while standing where one of your surveys is, when you log back in, the survey will be gone from your inventory, as if you gathered it, even though you didn't.
In the past I have left surveys with say 1 thing left to gather, because I missed node #6 or whatever, and have been able to go back and get that node. The survey would not vanish from my inventory until I collected it all.
When I lost a survey from getting disconnected, I decided to test it further. About 1 out of 20 times, even if you don't gather any of the nodes, if you log out while standing at a survey location, you lose that survey. On the other hand, if you gather just 1 node from the survey, then log out and back in, the survey is gone from your inventory 100% of the time.
Considering the number of disconnects the game is having lately, this is could be a big issue. Like many players, some days I am getting disconnected, or kicked back to the login screen, several times a day. Some days it is a couple times an hour. I tend to save surveys up, and do a bunch in one day. So far today, in a matter of about two hours, I got disconnected 3 times. It cost me 3 surveys. If I continue to do surveys today, which I won't given it is a "bad disconnect day", I could potentially lose a lot of mats.
Shouldn't there be something that keeps you from losing a survey just because of a DC?