Money missing without transaction history that matches missing amount?

Let me begin by saying that I DO recognize how ridiculous and convoluted this may sound, but has anyone reported issues with funds missing without any sort of transaction history to account for the missing amount? What I mean is (and this is the paranoid, idiotic, convoluted part) the "Available Balance" number literally just changing. My wife and I were discussing bills yesterday based on what the Available Balance reflected at 12pm, and a transfer she was planning today. Before the transfer, there was a difference of nearly 1,100, missing, with no transactions to support the difference. This is not the first time this has happened. I own my mistakes, and in the past Ive copped it up to my mistake, even when it was 400 or 500 usd. This... this was not our mistake. We had one amount yesterday (Tuesday) at 12pm PST, and then 1k less today at 10am.
Has anyone reported errors or glitches?