The wording on the scaling damage for Gout of Flame is the same as the wording for the Division surge. For some reason the Demiplane character sheet for the Cosmere RPG doesn’t apply the same damage dice scaling to the two abilities.
Division Surge
"The size of this attack’s damage dice increases with your ranks in Division; at 2 ranks, roll 3d6 (instead of 3d4), and so on. "
Gout of Flame
“The size of these damage dice increases with your ranks in Division; at 2 ranks, roll 3d6 (instead of 3d4), and so on.”
My character is level 7 with 3 ranks in Division. His Division Surge uses a d8 and Gout of flame uses d6. I tried removing a rank in Division and then re-applying it and the issue still persists. I was able to manually edit it as a short term fix.
Character Sheet