Thanks. This is the output of getblockchaininfo.  Can you see if it has reset the block download progress? Or maybe just again syncing?

"chain": "main",
  "blocks": 535936,
  "headers": 826689,
  "bestblockhash": "000000000000000000247fb1af3730f105ebf14b303d1c7eb6282cff46e94815",
  "difficulty": 5949437371609.53,
  "time": 1533817015,
  "mediantime": 1533815708,
  "verificationprogress": 0.3645248712057892,
  "initialblockdownload": true,
  "chainwork": "000000000000000000000000000000000000000002aae2c91fd6039d939eeb19",
  "size_on_disk": 567624183244,
  "pruned": false,
  "warnings": ""