Colour values changing when pasting between documents in Illustrator

[Blabbermouth]

Hi, So for past few months I have been seeing this weird issue where I copy an object (colour block) from one illustrator file to another and colour values and the colour change. both documents have the same colour setting (RGB) and same assigned profile. This is really frustrating as it changes the brand colour and I cannot find any way around this. Seen lots of people having similar issue yet I cannot seem to find a solution to this. I've never before had this issue. Any one found a solution to this? 

So on the screenshot attached the original colour value should be #ADEFD2 but when pasted into new document this changes to #94f1cf

Surely this must be some kind of a bug? 

[Ton Frederiks]

Is the Document Color Profile the same? Can be found here:

Do you have warnings on for missing and mismatching profiles in your Color Settings?