I too have notice the same problem. I first noticed last night (march 20. 2019) when my party went to short rest and when they used the hit dice roller, they all rolled D4's instead of their class hit dice. After searching in the Cog (settings) section of the sheet, we notice the Hit dice in the class options was set to d4 and not updated for the class. This morning (March 21. 2019) I have been working on setting up some pre-generated characters to use for a learning game I plan to run and noticed when I selected the class using the drop down, that the saves did not auto set themselves, and when I looked it the settings, the Hit-dice was also still set to D4 and not changing. I Originally thought this might be a problem of having a custom class on one of the character sheets on the table, one of my players is trying out the UA Artificer class and so we were using the custom class option in settings. But came here and saw this post. I have only checked this out in Chrome. I will trying clearing cache and disabling addons.