Yes, I agree as well. The new tab opening does not follow the convention of browser tabs - which is very confusing.
It is confusing not just because new tab opening in Axure does not follow the Chrome/ Safari browser conventions, but also displaces the previous tab position. These tabs are like a moving target and I always have to check multiple times to figure out if it is the right tab I am working on.
If Axure does not plan to change the new tab order, it should give an option where user could enable if the new tab opens on the right or the left.
I have been using Axure for a good part of ten years now, but tab opening always gets me.