Hey guys, I have a problem – some time ago, I bought SDC, moved it to my wallet and have been staking since then.

I'm on Windows now and have a slight issue that when I'm AFK for a long time, my OS goes to sleep but can't be woken up, so I have to hard restart it.
That happened just now and when I opened my wallet, I see that my wallet shows almost 6.400 SDC less than I should have (that never happened before).

My wallet is in sync, there are no outgoing transactions in my wallet and I'm kinda freaking out.
Can somebody tell me what happened or how to advance? You can imagine how unpleasant that is.