More than half of my zSilver has dissapeared

this morning I opened up my soft miner and found that I only had 1,948 zsilver. I had actually kept track and originally had 5,501 zsilver This are the logs I kept in notepad: Razer Silver log: Start Febuary 3rd 2019 10:38pm 5,286 zSilver Finish Febuary 4th 2019 12:08am 5,376 zSilver Start Febuary 4th 2019 8:01pm 5,379 zSilver Finish Febuary 5th 2019 2:00pm 5,501 zSilver (was a while ago but its what I remember having) But when I checked this morning I had this. has something happened to the software? I hadn't bought anything with my silver as I have been saving up. this is all very peculiar and I would like some help.