true fix

Author: IslandRhythms

lib/schema.js

@@ -413,7 +413,7 @@ Schema.prototype._clone = function _clone(Constructor) {
 
   s.tree = clone(this.tree);
   s.paths = Object.fromEntries(
-    Object.entries(this.paths).map(([key, value]) => ([key, !value.$isMongooseDocumentArray ? value.clone() : value]))
+    Object.entries(this.paths).map(([key, value]) => ([key, value.clone()]))
   );
   s.nested = clone(this.nested);
   s.subpaths = clone(this.subpaths);

lib/schema/documentarray.js

@@ -89,7 +89,7 @@ function DocumentArrayPath(key, schema, options, schemaOptions) {
   this.$embeddedSchemaType.caster = this.Constructor;
   this.$embeddedSchemaType.schema = this.schema;
 
-  if (schema._applyDiscriminators != null) {
+  if (schema._applyDiscriminators != null && !options?._skipApplyDiscriminators) {
     for (const disc of schema._applyDiscriminators.keys()) {
       this.discriminator(disc, schema._applyDiscriminators.get(disc));
     }
@@ -528,7 +528,7 @@ DocumentArrayPath.prototype.cast = function(value, doc, init, prev, options) {
 
 DocumentArrayPath.prototype.clone = function() {
   const options = Object.assign({}, this.options);
-  const schematype = new this.constructor(this.path, this.schema, options, this.schemaOptions);
+  const schematype = new this.constructor(this.path, this.schema, { ...options, _skipApplyDiscriminators: true }, this.schemaOptions);
   schematype.validators = this.validators.slice();
   if (this.requiredValidator !== undefined) {
     schematype.requiredValidator = this.requiredValidator;