Hi,

As you can see in the image, when I put in the insight and uncheck inspiration, it says I can reach r5 using 3 silver mireslush hide + 1 gold mireslush hide + 1 gold writhebark.

But you can see that when I put in all silver mats, it hit r5 anyway.

could it be that the gold bark at the time of the screenshot is worth less than the silver one?

This is a recraft and for recrafting you usually have a higher skill then you would expect with only using rank 2 mats, working as intended but you can't really predict it sadly