Steps to reproduce: - Create a new game with the "D&D 5E by Roll20" character sheet - Create a new character Note that the hit dice is correct, even after closing and re-opening the sheet. - Give the character 300 xp and level it up with the charactermancer. Note that the hit dice is now wrongly a D4. - Change the hit dice back to the correct one. - Close and re-open the sheet. Note that the hit dice is now back to being a D4. There seems to be no way to coerce the character sheet into retaining the correct hit dice. I have created a test campaign to perform these steps here: <a href="https://app.roll20.net/campaigns/details/6940174/reproduce-d4-hit-dice-bug" rel="nofollow">https://app.roll20.net/campaigns/details/6940174/reproduce-d4-hit-dice-bug</a>