I don’t have access to a PC at the moment so cannot check that out.
However I was looking up previous posts on the topic as I knew there are plenty.
In this topic there’s a screenshot of some dice-stats. The funny thing I noticed is that the given median is different, either 3 or 4, for different players. It should be exactly 3,5 for all players I think.
So while I’m confident the actual given dice in the game are fair perhaps the calculated dice statistics are off.
@Kindwind perhaps you can check if you see a relation between given median and the deviation in your stats and if perhaps the given median is side dependent (for example: first alliance gets median 3, second gets 4).