Error in entities (Minecarts) traveling through two portals

I sent a normal minecart through one portal and toward another in the nether. The minecart landed inside the portal but did not travel through. I tried again, but broke the minecart and replaced it after it entered the nether. It then traveled through the second portal easily. This problem is caused, I believe, by minecarts (Maybe all entities, have not tried any others) not updating when they enter the nether.