I was trying to buy some short-term t-bills around the time of the debt-ceiling negotiation as the yields are likely to be higher than usual and the government might need more money from us.
I placed an initial bid (about 20 percent of my target) just to check the process, and at the end the system gave me some server error message, so I repeated the process a few times.
Later, I realized that all my (five) bids actually went through and it was just the server that was responsible for the survey at the end that was down.