One other note, I get two different encryption values:

2017 - 0x02000000A584538F00817EFA13FB8E176BC435F7FD2A3AEDC9E79AFD2DD203B1356DB2CE
2016 - 0x01000000CBBF1DA4C95CABB66EDE087B7EA983C599D663DB2DA80D49
2017 seems to decrypt 2016, but not vice versa. Need to test more,  but this could be an issue.

Nice  catch.