While testing out version 4.58.02 I've noticed that some calculations are being turned into dates.
On pipedream 4.56.02 (the version I use at the moment) the calculation 1812-6-2 gives the correct result of 1804 but in the newer versions of pipedream I get the result of '2 Jun 1812', which means that math calculations are being turned into dates.
I've also noticed then even if the calculation has any hint of a possible date conversion it will do it, ie 4+1605-10-4+5 end up as being turned into a date, making its use as a spreadsheet a bit problematic for me.