New source found from dndbeyond.com

ddb_main/packages/rules-engine/es/engine/Class/accessors.js

@@ -437,6 +437,13 @@ export function getUniqueClassFeatures(charClass) {
 export function getVisibileClassFeatures(charClass) {
     return charClass.visibleClassFeatures;
 }
+/**
+ *
+ * @param charClass
+ */
+export function getHigherLevelClassFeatures(charClass) {
+    return charClass.higherLevelClassFeatures;
+}
 /**
  *
  * @param charClass

ddb_main/packages/rules-engine/es/engine/Class/derivers.js

@@ -145,11 +145,14 @@ export function deriveClassFeatureGroups(charClass, classFeatures, appContext) {
         }
         return acc;
     }, []);
+    const higherLevelFeatures = classFeatures.filter((feature) => ClassFeatureAccessors.getRequiredLevel(feature) > getLevel(charClass) &&
+        (appContext === null || !ClassFeatureUtils.getHideInContext(feature, appContext)));
     return {
         activeFeatures,
         visibleFeatures,
         orderedFeatures,
         uniqueFeatures,
+        higherLevelFeatures,
     };
 }
 /**

ddb_main/packages/rules-engine/es/engine/Class/generators.js

@@ -62,11 +62,11 @@ export function generateBaseCharClass(charClass, optionalClassFeatures, allClass
             featureSpells.push(...OptionAccessors.getSpells(option));
         });
     });
-    const { activeFeatures, visibleFeatures, orderedFeatures, uniqueFeatures } = deriveClassFeatureGroups(charClass, updatedFeatures, appContext);
+    const { activeFeatures, visibleFeatures, orderedFeatures, uniqueFeatures, higherLevelFeatures } = deriveClassFeatureGroups(charClass, updatedFeatures, appContext);
     // do any class features or modifiers enable hex, pact or dedicated weapons
     //TODO eventually should just be able to use modifiers here and not have to check class feature names
     const { enablesHexWeapon, enablesPactWeapon, enablesDedicatedWeapon } = deriveDedicatedHexAndPactWeaponEnabled(updatedFeatures, classModifiers);
-    return Object.assign(Object.assign({}, charClass), { activeId: deriveActiveId(charClass), spells: SpellGenerators.updateClassSpells(featureSpells, classSpells), modifiers: classModifiers, featureSpells, classFeatures: updatedFeatures, optionalClassFeatures, activeClassFeatures: activeFeatures, visibleClassFeatures: visibleFeatures, orderedClassFeatures: orderedFeatures, uniqueClassFeatures: uniqueFeatures, feats,
+    return Object.assign(Object.assign({}, charClass), { activeId: deriveActiveId(charClass), spells: SpellGenerators.updateClassSpells(featureSpells, classSpells), modifiers: classModifiers, featureSpells, classFeatures: updatedFeatures, optionalClassFeatures, activeClassFeatures: activeFeatures, visibleClassFeatures: visibleFeatures, orderedClassFeatures: orderedFeatures, uniqueClassFeatures: uniqueFeatures, higherLevelClassFeatures: higherLevelFeatures, feats,
         actions,
         enablesDedicatedWeapon,
         enablesHexWeapon,

ddb_main/packages/rules-engine/es/engine/Spell/derivers.js

@@ -217,7 +217,7 @@ export function getCastLevelRange(spell, spellCasterInfo, ruleData) {
             ...spellCasterInfo.availableSpellLevels,
             ...spellCasterInfo.availablePactMagicLevels,
         ].filter((level) => level >= getLevel(spell));
-        startLevel = Math.max(getLevel(spell), Math.min(...availableLevels));
+        startLevel = Math.max(getLevel(spell), availableLevels.length > 0 ? Math.min(...availableLevels) : 0);
         endLevel = Math.max(getLevel(spell), ...availableLevels);
         if (limitedUse && getDataOriginType(spell) === DataOriginTypeEnum.CLASS_FEATURE) {
             const dataOrigin = getDataOrigin(spell);

ddb_main/subApps/builder/components/InputField/InputField.tsx

@@ -79,12 +79,20 @@ export const InputField: FC<InputFieldProps> = ({
     const intValue = parseInt(e.target.value);
 
     // If entered value is below the minimum, reset to minimum
-    if (!isNaN(intValue) && inputProps?.min && intValue < inputProps?.min) {
+    if (
+      !isNaN(intValue) &&
+      inputProps?.min !== undefined &&
+      intValue < inputProps.min
+    ) {
       setValue(inputProps.min);
     }
 
     // If entered value is above the maximum and no initialValue exists, reset to maximum
-    if (!isNaN(intValue) && inputProps?.max && intValue > inputProps?.max) {
+    if (
+      !isNaN(intValue) &&
+      inputProps?.max !== undefined &&
+      intValue > inputProps.max
+    ) {
       setValue(inputProps.max);
     }
 

ddb_main/tools/js/CharacterBuilder/containers/pages/ClassesManage/ClassManager/ClassManager.tsx

@@ -257,11 +257,8 @@ export default class ClassManager extends React.PureComponent<Props, State> {
       visibleClassFeatures
     ).filter((feature) => ClassFeatureUtils.getRequiredLevel(feature) <= level);
 
-    const classFeatures = ClassUtils.getClassFeatures(charClass);
+    const atHigherLevelsClassFeatures = ClassUtils.deriveOrderedClassFeatures(
-    const orderedClassFeatures =
+      ClassUtils.getHigherLevelClassFeatures(charClass)
-      ClassUtils.deriveOrderedClassFeatures(classFeatures);
-    const atHigherLevelsClassFeatures = orderedClassFeatures.filter(
-      (feature) => ClassFeatureUtils.getRequiredLevel(feature) > level
     );
 
     return (