Is referall tracking working allright for last two days?

Hello I have strange problem. For last two days I did not get any confirmed 30-day-use which is quite weird, because my traffic was the same all last two months and I used to get like 5-15 confirmed installs per day, while my amount of installs per day was similar all the time. I did not get any new confirmed installs on the older installs which is also weird, its like stuck on 225 confirmed installs for last two days.