Shortages

I'm curious if anyone else is having this problem. Over the past few weeks, my main on KB is having sudden and massive shortages of a variety of products; no rhyme or reason. Before this, I have not adjusted my purchasing strategies and there have always been enough supply. I adjusted it a little recently, the water marks and amounts to purchase but I'm still left with having to do immediate orders. I noticed that my spending limits are at 0 whenever this happens and I cannot see where this is happening on the logs.

Just wondering if this is just my country..