I have the Sorcerous Burst cantrip on my character and for some reason the only die that rolls correctly is the acid damage at 2d8 for after level 5.

I'm playing a Warlock with a preference to fire damage, and all other die show up as 1d8 only. 

Can this be fixed?

Ditto this.  Same issue for 4d8 at level 20.  Increase only shown for acid damage, all the others remain 1d8.

I imagine we will just have to wait till they fix it on the site calculation. 

I dont even know if they are aware of this issue.

I have the same problem. only one that 2d8s is Acid, must fix. 

Same issue for me and people in my weekly group. No acknowledgement from DnDbeyond about it. This also happens on Chromatic Orb https://www.dndbeyond.com/characters/136047139 

I also had this exact same issue, with my first combat spell in my first combat ironically enough. I am glad to see that it is not just me!

I've noticed mine isnt re-rolling 8s.  If its working for other people its worth noting my casting came from Pact of the Tome invocation.

Quote from Mortisfilia >>

I've noticed mine isnt re-rolling 8s.  If its working for other people its worth noting my casting came from Pact of the Tome invocation.

 None of those sorts of things are supported. You have to preroll on your own