src/features/housekeeping/domains/content/pages/content-command-form.tsx

@@ -41,6 +41,7 @@ interface ContentCommandFormProps extends ContentCommandSubmission {
 }
 
 const OMIT_FIELD = Symbol("omit optional Content command field");
+const UNCHECKED_CHECKBOX_VALUE = "false";
 function optionalEmptyValue(field: ContentCommandField): unknown {
 	return field.emptyValue === null || field.emptyValue === ""
 		? field.emptyValue
@@ -115,7 +116,11 @@ function readSubmittedValues(
 	for (const field of fields) {
 		if (field.type === "file") continue;
 		const value = formData.get(field.name);
-		if (typeof value === "string") values[field.name] = value;
+		if (typeof value === "string") {
+			values[field.name] = value;
+		} else if (field.type === "checkbox" && !field.allowUnchanged) {
+			values[field.name] = UNCHECKED_CHECKBOX_VALUE;
+		}
 	}
 	if (requiresReason) {
 		const reason = formData.get("reason");
@@ -247,8 +252,9 @@ export function ContentCommandForm({
 									name={field.name}
 									type="checkbox"
 									defaultChecked={
-										retainedValue === "on" ||
-										(retainedValue === undefined && field.defaultValue === true)
+										retainedValue === undefined
+											? field.defaultValue === true
+											: retainedValue === "on"
 									}
 									{...fieldErrorProps}
 								/>{" "}